(cherry picked from commit d466316a)

FS-5325 i'll put the nonblocking in but I still think this is a problem with openssl, a short read is not there every single time you connect, When the lib is in full blocking mode it should be handling the complicated actions internally.  As complicated as socket programming is, async ssl is even worse because it requires you to do your own buffering and attemps to read may fail waiting for you to write or vice-versa which should have been handled for us in the lib.  non-interruptable syscalls are getting pretty outdated and not enabling it is much less complex than making every socket app on earth be non-blocking

FS-5395: False alarm on a reported valgrind memory leak. The io_private is alloc'd from a memory pool which valgrind sucks at tracking. No need to free this, because it'll get cleared when the memory pool on the rsession is destroyed.

FS-5395: --resolve Resolve another mod_rtmp crash where oh specific hangup scenarios there would be a free of variable that wasn't ever malloced

FS-5085 I discovered that the bowout is happening from both legs at once, we only need to check this condition on the A side of the loopback bridge

This reverts commit d8edc031.

Conflicts:
	src/mod/endpoints/mod_rtmp/mod_rtmp.c