archives: avoid collapsing archive with single folder

We have historically used the m_bIsFolder after this as a flag,
to skip display of file. For example for rar 00X part files.

By not collopsing single folders, we can properly browse into
them again.
Properly handle cookies that specify a sub-domain
ffmpeg: correctly handle cookies that specify a sub-domain
Merge pull request #4081 from voguemaster/master

ffmpeg: Correctly handle cookies that specify a sub-domain.
Merge pull request #4050 from elupus/archivefolder

archives: avoid collapsing archive with single folder
[depends] move ffmpeg to unified deps
[configure] remove internal ffmpeg
sq to configure - we need to be able to selectively disable hw codecs
sq to configure - get rid of USE_EXTERNAL_FFMPEG
remove ffmpeg from tree
ffmpeg: remove dll wrappers
add ffmpeg lock manager
todo: refactor to own file
ffmpeg: move callbacks into separate file