Sacrifice the ram of curl handles in stratum disconnects when we have built with old libcurl to avoid crashes.
diff --git a/util.c b/util.c
index 1c77df1..911d92c 100644
--- a/util.c
+++ b/util.c
@@ -1508,7 +1508,15 @@ void suspend_stratum(struct pool *pool)
applog(LOG_INFO, "Closing socket for stratum pool %d", pool->pool_no);
mutex_lock(&pool->stratum_lock);
pool->stratum_active = pool->stratum_notify = false;
+#if CURL_HAS_KEEPALIVE
curl_easy_cleanup(pool->stratum_curl);
+#else
+ /* Old versions of libcurl seem to crash occasionally on this since
+ * the socket is modified in keep_sockalive in ways curl does not
+ * know about so sacrifice the ram knowing we leak one curl handle
+ * every time we disconnect stratum. */
+ CLOSESOCKET(pool->sock);
+#endif
pool->stratum_curl = NULL;
mutex_unlock(&pool->stratum_lock);
}