encx265: miscellaneous fixes, cleanup and refactoring.


git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@6026 b64f7644-9d1e-0410-96f1-a4d463321fa5
x265: misc. container-related fixes.

CLI users: please use -f x265 instead of -f raw


git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@6027 b64f7644-9d1e-0410-96f1-a4d463321fa5
QSV: fix compiler warning.

Was fixed for encx264 in SVN revision 5999.


git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@6028 b64f7644-9d1e-0410-96f1-a4d463321fa5