thodg/libgit2

diff --git a/include/git2/remote.h b/include/git2/remote.h
index a39e5a4..9237ca2 100644
--- a/include/git2/remote.h
+++ b/include/git2/remote.h
@@ -241,9 +241,10 @@ GIT_EXTERN(const git_refspec *)git_remote_get_refspec(const git_remote *remote, 
  * @param direction GIT_DIRECTION_FETCH if you want to fetch or
  * GIT_DIRECTION_PUSH if you want to push
  * @param callbacks the callbacks to use for this connection
+ * @param custom_headers extra HTTP headers to use in this connection
  * @return 0 or an error code
  */
-GIT_EXTERN(int) git_remote_connect(git_remote *remote, git_direction direction, const git_remote_callbacks *callbacks);
+GIT_EXTERN(int) git_remote_connect(git_remote *remote, git_direction direction, const git_remote_callbacks *callbacks, const git_strarray *custom_headers);
 
 /**
  * Get the remote repository's reference advertisement list
diff --git a/include/git2/sys/transport.h b/include/git2/sys/transport.h
index 4a75b08..ca8617f 100644
--- a/include/git2/sys/transport.h
+++ b/include/git2/sys/transport.h
@@ -40,6 +40,11 @@ struct git_transport {
 		git_transport_certificate_check_cb certificate_check_cb,
 		void *payload);
 
+	/* Set custom headers for HTTP requests */
+	int (*set_custom_headers)(
+		git_transport *transport,
+		const git_strarray *custom_headers);
+
 	/* Connect the transport to the remote repository, using the given
 	 * direction. */
 	int (*connect)(
diff --git a/src/push.c b/src/push.c
index a0d8a05..3c9fa2f 100644
--- a/src/push.c
+++ b/src/push.c
@@ -73,6 +73,7 @@ int git_push_set_options(git_push *push, const git_push_options *opts)
 	GITERR_CHECK_VERSION(opts, GIT_PUSH_OPTIONS_VERSION, "git_push_options");
 
 	push->pb_parallelism = opts->pb_parallelism;
+	push->custom_headers = &opts->custom_headers;
 
 	return 0;
 }
@@ -638,7 +639,7 @@ int git_push_finish(git_push *push, const git_remote_callbacks *callbacks)
 	int error;
 
 	if (!git_remote_connected(push->remote) &&
-	    (error = git_remote_connect(push->remote, GIT_DIRECTION_PUSH, callbacks)) < 0)
+	    (error = git_remote_connect(push->remote, GIT_DIRECTION_PUSH, callbacks, push->custom_headers)) < 0)
 		return error;
 
 	if ((error = filter_refs(push->remote)) < 0 ||
diff --git a/src/push.h b/src/push.h
index a847ee0..e32ad2f 100644
--- a/src/push.h
+++ b/src/push.h
@@ -38,6 +38,7 @@ struct git_push {
 
 	/* options */
 	unsigned pb_parallelism;
+	const git_strarray *custom_headers;
 };
 
 /**
diff --git a/src/remote.c b/src/remote.c
index 7404bf4..9e907d2 100644
--- a/src/remote.c
+++ b/src/remote.c
@@ -687,7 +687,15 @@ int set_transport_callbacks(git_transport *t, const git_remote_callbacks *cbs)
 				cbs->certificate_check, cbs->payload);
 }
 
-int git_remote_connect(git_remote *remote, git_direction direction, const git_remote_callbacks *callbacks)
+int set_transport_custom_headers(git_transport *t, const git_strarray *custom_headers)
+{
+	if (!t->set_custom_headers || !custom_headers)
+		return 0;
+
+	return t->set_custom_headers(t, custom_headers);
+}
+
+int git_remote_connect(git_remote *remote, git_direction direction, const git_remote_callbacks *callbacks, const git_strarray *custom_headers)
 {
 	git_transport *t;
 	const char *url;
@@ -726,6 +734,9 @@ int git_remote_connect(git_remote *remote, git_direction direction, const git_re
 	if (!t && (error = git_transport_new(&t, remote, url)) < 0)
 		return error;
 
+	if ((error = set_transport_custom_headers(t, custom_headers)) != 0)
+		goto on_error;
+
 	if ((error = set_transport_callbacks(t, callbacks)) < 0 ||
 	    (error = t->connect(t, url, credentials, payload, direction, flags)) != 0)
 		goto on_error;
@@ -893,7 +904,7 @@ int git_remote_download(git_remote *remote, const git_strarray *refspecs, const 
 	}
 
 	if (!git_remote_connected(remote) &&
-	    (error = git_remote_connect(remote, GIT_DIRECTION_FETCH, cbs)) < 0)
+	    (error = git_remote_connect(remote, GIT_DIRECTION_FETCH, cbs, NULL)) < 0)
 		goto on_error;
 
 	if (ls_to_vector(&refs, remote) < 0)
@@ -966,7 +977,7 @@ int git_remote_fetch(
 	}
 
 	/* Connect and download everything */
-	if ((error = git_remote_connect(remote, GIT_DIRECTION_FETCH, cbs)) != 0)
+	if ((error = git_remote_connect(remote, GIT_DIRECTION_FETCH, cbs, NULL)) != 0)
 		return error;
 
 	error = git_remote_download(remote, refspecs, opts);
@@ -2384,7 +2395,7 @@ int git_remote_upload(git_remote *remote, const git_strarray *refspecs, const gi
 		cbs = &opts->callbacks;
 
 	if (!git_remote_connected(remote) &&
-	    (error = git_remote_connect(remote, GIT_DIRECTION_PUSH, cbs)) < 0)
+	    (error = git_remote_connect(remote, GIT_DIRECTION_PUSH, cbs, &opts->custom_headers)) < 0)
 		goto cleanup;
 
 	free_refspecs(&remote->active_refspecs);
@@ -2441,7 +2452,7 @@ int git_remote_push(git_remote *remote, const git_strarray *refspecs, const git_
 
 	assert(remote && refspecs);
 
-	if ((error = git_remote_connect(remote, GIT_DIRECTION_PUSH, cbs)) < 0)
+	if ((error = git_remote_connect(remote, GIT_DIRECTION_PUSH, cbs, &opts->custom_headers)) < 0)
 		return error;
 
 	if ((error = git_remote_upload(remote, refspecs, opts)) < 0)
diff --git a/tests/network/remote/defaultbranch.c b/tests/network/remote/defaultbranch.c
index e83755e..5edd79f 100644
--- a/tests/network/remote/defaultbranch.c
+++ b/tests/network/remote/defaultbranch.c
@@ -26,7 +26,7 @@ static void assert_default_branch(const char *should)
 {
 	git_buf name = GIT_BUF_INIT;
 
-	cl_git_pass(git_remote_connect(g_remote, GIT_DIRECTION_FETCH, NULL));
+	cl_git_pass(git_remote_connect(g_remote, GIT_DIRECTION_FETCH, NULL, NULL));
 	cl_git_pass(git_remote_default_branch(&name, g_remote));
 	cl_assert_equal_s(should, name.ptr);
 	git_buf_free(&name);
@@ -57,7 +57,7 @@ void test_network_remote_defaultbranch__no_default_branch(void)
 	git_buf buf = GIT_BUF_INIT;
 
 	cl_git_pass(git_remote_create(&remote_b, g_repo_b, "self", git_repository_path(g_repo_b)));
-	cl_git_pass(git_remote_connect(remote_b, GIT_DIRECTION_FETCH, NULL));
+	cl_git_pass(git_remote_connect(remote_b, GIT_DIRECTION_FETCH, NULL, NULL));
 	cl_git_pass(git_remote_ls(&heads, &len, remote_b));
 	cl_assert_equal_i(0, len);
 
@@ -80,7 +80,7 @@ void test_network_remote_defaultbranch__detached_sharing_nonbranch_id(void)
 	cl_git_pass(git_reference_create(&ref, g_repo_a, "refs/foo/bar", &id, 1, NULL));
 	git_reference_free(ref);
 
-	cl_git_pass(git_remote_connect(g_remote, GIT_DIRECTION_FETCH, NULL));
+	cl_git_pass(git_remote_connect(g_remote, GIT_DIRECTION_FETCH, NULL, NULL));
 	cl_git_fail_with(GIT_ENOTFOUND, git_remote_default_branch(&buf, g_remote));
 
 	cl_git_pass(git_clone(&cloned_repo, git_repository_path(g_repo_a), "./local-detached", NULL));
diff --git a/tests/network/remote/local.c b/tests/network/remote/local.c
index 5d726c9..4d990ab 100644
--- a/tests/network/remote/local.c
+++ b/tests/network/remote/local.c
@@ -40,7 +40,7 @@ static void connect_to_local_repository(const char *local_repository)
 	git_buf_sets(&file_path_buf, cl_git_path_url(local_repository));
 
 	cl_git_pass(git_remote_create_anonymous(&remote, repo, git_buf_cstr(&file_path_buf)));
-	cl_git_pass(git_remote_connect(remote, GIT_DIRECTION_FETCH, NULL));
+	cl_git_pass(git_remote_connect(remote, GIT_DIRECTION_FETCH, NULL, NULL));
 }
 
 void test_network_remote_local__connected(void)
@@ -214,7 +214,7 @@ void test_network_remote_local__push_to_bare_remote(void)
 
 	/* Connect to the bare repo */
 	cl_git_pass(git_remote_create_anonymous(&localremote, repo, "./localbare.git"));
-	cl_git_pass(git_remote_connect(localremote, GIT_DIRECTION_PUSH, NULL));
+	cl_git_pass(git_remote_connect(localremote, GIT_DIRECTION_PUSH, NULL, NULL));
 
 	/* Try to push */
 	cl_git_pass(git_remote_upload(localremote, &push_array, NULL));
@@ -253,7 +253,7 @@ void test_network_remote_local__push_to_bare_remote_with_file_url(void)
 
 	/* Connect to the bare repo */
 	cl_git_pass(git_remote_create_anonymous(&localremote, repo, url));
-	cl_git_pass(git_remote_connect(localremote, GIT_DIRECTION_PUSH, NULL));
+	cl_git_pass(git_remote_connect(localremote, GIT_DIRECTION_PUSH, NULL, NULL));
 
 	/* Try to push */
 	cl_git_pass(git_remote_upload(localremote, &push_array, NULL));
@@ -290,7 +290,7 @@ void test_network_remote_local__push_to_non_bare_remote(void)
 
 	/* Connect to the bare repo */
 	cl_git_pass(git_remote_create_anonymous(&localremote, repo, "./localnonbare"));
-	cl_git_pass(git_remote_connect(localremote, GIT_DIRECTION_PUSH, NULL));
+	cl_git_pass(git_remote_connect(localremote, GIT_DIRECTION_PUSH, NULL, NULL));
 
 	/* Try to push */
 	cl_git_fail_with(GIT_EBAREREPO, git_remote_upload(localremote, &push_array, NULL));
diff --git a/tests/network/remote/remotes.c b/tests/network/remote/remotes.c
index 2fa21d4..46abc6d 100644
--- a/tests/network/remote/remotes.c
+++ b/tests/network/remote/remotes.c
@@ -93,7 +93,7 @@ void test_network_remote_remotes__error_when_no_push_available(void)
 	cl_git_pass(git_remote_create_anonymous(&r, _repo, cl_fixture("testrepo.git")));
 
 	callbacks.transport = git_transport_local;
-	cl_git_pass(git_remote_connect(r, GIT_DIRECTION_PUSH, &callbacks));
+	cl_git_pass(git_remote_connect(r, GIT_DIRECTION_PUSH, &callbacks, NULL));
 
 	/* Make sure that push is really not available */
 	r->transport->push = NULL;
@@ -359,7 +359,7 @@ void test_network_remote_remotes__can_load_with_an_empty_url(void)
 	cl_assert(remote->url == NULL);
 	cl_assert(remote->pushurl == NULL);
 
-	cl_git_fail(git_remote_connect(remote, GIT_DIRECTION_FETCH, NULL));
+	cl_git_fail(git_remote_connect(remote, GIT_DIRECTION_FETCH, NULL, NULL));
 
 	cl_assert(giterr_last() != NULL);
 	cl_assert(giterr_last()->klass == GITERR_INVALID);
@@ -376,7 +376,7 @@ void test_network_remote_remotes__can_load_with_only_an_empty_pushurl(void)
 	cl_assert(remote->url == NULL);
 	cl_assert(remote->pushurl == NULL);
 
-	cl_git_fail(git_remote_connect(remote, GIT_DIRECTION_FETCH, NULL));
+	cl_git_fail(git_remote_connect(remote, GIT_DIRECTION_FETCH, NULL, NULL));
 
 	git_remote_free(remote);
 }
diff --git a/tests/online/fetch.c b/tests/online/fetch.c
index 72e7c24..c12df06 100644
--- a/tests/online/fetch.c
+++ b/tests/online/fetch.c
@@ -81,11 +81,11 @@ void test_online_fetch__fetch_twice(void)
 {
 	git_remote *remote;
 	cl_git_pass(git_remote_create(&remote, _repo, "test", "git://github.com/libgit2/TestGitRepository.git"));
-	cl_git_pass(git_remote_connect(remote, GIT_DIRECTION_FETCH, NULL));
+	cl_git_pass(git_remote_connect(remote, GIT_DIRECTION_FETCH, NULL, NULL));
 	cl_git_pass(git_remote_download(remote, NULL, NULL));
     	git_remote_disconnect(remote);
     	
-	git_remote_connect(remote, GIT_DIRECTION_FETCH, NULL);
+	git_remote_connect(remote, GIT_DIRECTION_FETCH, NULL, NULL);
 	cl_git_pass(git_remote_download(remote, NULL, NULL));
 	git_remote_disconnect(remote);
 	
@@ -117,7 +117,7 @@ void test_online_fetch__doesnt_retrieve_a_pack_when_the_repository_is_up_to_date
 	cl_git_pass(git_repository_open(&_repository, "./fetch/lg2"));
 
 	cl_git_pass(git_remote_lookup(&remote, _repository, "origin"));
-	cl_git_pass(git_remote_connect(remote, GIT_DIRECTION_FETCH, NULL));
+	cl_git_pass(git_remote_connect(remote, GIT_DIRECTION_FETCH, NULL, NULL));
 
 	cl_assert_equal_i(false, invoked);
 
@@ -155,7 +155,7 @@ void test_online_fetch__can_cancel(void)
 	options.callbacks.transfer_progress = cancel_at_half;
 	options.callbacks.payload = &bytes_received;
 
-	cl_git_pass(git_remote_connect(remote, GIT_DIRECTION_FETCH, NULL));
+	cl_git_pass(git_remote_connect(remote, GIT_DIRECTION_FETCH, NULL, NULL));
 	cl_git_fail_with(git_remote_download(remote, NULL, &options), -4321);
 	git_remote_disconnect(remote);
 	git_remote_free(remote);
@@ -169,7 +169,7 @@ void test_online_fetch__ls_disconnected(void)
 
 	cl_git_pass(git_remote_create(&remote, _repo, "test",
 				"http://github.com/libgit2/TestGitRepository.git"));
-	cl_git_pass(git_remote_connect(remote, GIT_DIRECTION_FETCH, NULL));
+	cl_git_pass(git_remote_connect(remote, GIT_DIRECTION_FETCH, NULL, NULL));
 	cl_git_pass(git_remote_ls(&refs, &refs_len_before, remote));
 	git_remote_disconnect(remote);
 	cl_git_pass(git_remote_ls(&refs, &refs_len_after, remote));
@@ -187,7 +187,7 @@ void test_online_fetch__remote_symrefs(void)
 
 	cl_git_pass(git_remote_create(&remote, _repo, "test",
 				"http://github.com/libgit2/TestGitRepository.git"));
-	cl_git_pass(git_remote_connect(remote, GIT_DIRECTION_FETCH, NULL));
+	cl_git_pass(git_remote_connect(remote, GIT_DIRECTION_FETCH, NULL, NULL));
 	git_remote_disconnect(remote);
 	cl_git_pass(git_remote_ls(&refs, &refs_len, remote));
 
diff --git a/tests/online/push.c b/tests/online/push.c
index 0b0892c..13d364d 100644
--- a/tests/online/push.c
+++ b/tests/online/push.c
@@ -373,7 +373,7 @@ void test_online_push__initialize(void)
 
 	record_callbacks_data_clear(&_record_cbs_data);
 
-	cl_git_pass(git_remote_connect(_remote, GIT_DIRECTION_PUSH, &_record_cbs));
+	cl_git_pass(git_remote_connect(_remote, GIT_DIRECTION_PUSH, &_record_cbs, NULL));
 
 	/* Clean up previously pushed branches.  Fails if receive.denyDeletes is
 	 * set on the remote.  Also, on Git 1.7.0 and newer, you must run