Merge branch 'issue-807-accept4-getnameinfo-AF_UNIX' * issue-807-accept4-getnameinfo-AF_UNIX: http-server: add usage/help dialog http: avoid use of uninitialized value for AF_UNIX/AF_LOCAL sockaddr http-server: add ability to bind to unix-socket build: struct sockaddr_un detection (sys/un.h, afunix.h) Fixes: #807