[POSIX] fix mount regexp on FreeBSD

same as OSX
Merge pull request #5145 from Montellese/videodb_use_triggers

videodb: use triggers to delete items from link tables
Merge pull request #5125 from Montellese/binary_addons_plat

binary addons: add platforms.txt to be able to control on which platforms an addon can be built
Merge pull request #5094 from popcornmix/limitres

[rbp] Make gui limit default to 720 when memory is limited
binary addons: allow downloading addons as source packages instead of git repositories
Merge pull request #5159 from Fneufneu/mount_freebsd

[POSIX] fix mount regexp on FreeBSD
[cosmetics] mouse handling
[omxplayer] Use macros to reduce diffs with dvdplayer
[omxplayer] Use names closer to dvdplayer
[omxplayer] GetAbsoluteClock like dvdplayer
[omxplayer] Cosmetic: Copy formatting from dvdplayer
[omxplayer] Update master clock changes from dvdplayer
[omxplayer] Update to dvdrefactor
[players] Move Step implementation into PlayerVideo
[players] Make methods protected
[players] Remove unused functions
[players] constify functions
[players] Add plumbing for missing methods for consistency
Includes: Replace includes with "sub-includes" if possible.
Includes: Remove unnecessary includes.