Updated main code to SVN #20277.

Include new deinterlacer for perfect image quality when using an interlaced display mode that matches the source.

http://svn.mythtv.org/trac/ticket/6391

Also adding:

http://svn.mythtv.org/trac/ticket/2903

(though using the code from trunk: http://svn.mythtv.org/trac/changeset/20277)

Build packages with patch #20263