lua http: make string easier to translate
avcodec: support private options

Usage:
--avcodec-options='{lowres=3,foobar=baz}'
--sout-avcodec-options='{threads=42}'

For now the decoder options are global, they apply to audio/video/subtitles decoder.
encoder options can be set in the sout chain, specific to each ES
Newer pot file
macosx: try to correctly hide fspanel

hopefully fixes #8489
macosx: remove recursive lock from fullscreen animation

This code is needless and had no effect for the last five years, already.
macosx: add missing retains when exchanging views
macosx: move fullscreen-related method to VideoWindowCommon class

No functional changes, code is still inactive
Decklink access: set physical channels config