transcode: log cleanups, some memory leaks fixed
hdhomerun: fix a leak
configure: print the error message when no or old libav/ffmpeg found, fixes #2378
WEBUI: Correct help and cosmetic
WEBUI HELP: DVR: Try to clean the help filenames
tvhdhomerun: check return values of setsockopt
tvhdhomerun: properly close sockets on error
packet: remove aligned_alloc