Merge pull request #4650 from FernetMenta/paplayer

paplayer: fix accidently disabled seek by fc2b1b2
[release] bump atv2/ios for re-release
Merge pull request #4651 from MartijnKaijser/ios-atv2_bump

Ios atv2 bump
[configure] use pkg-config for rtmp detection. fixes linking with newer librtmp versions
[configure] fix static linking when ffmpeg found nettle/hogweed
Merge pull request #4654 from wsnipex/linking-fix

Fix building on linux with newer librtmp nr2
Merge remote-tracking branch 'upstream/gotham' into Gotham