Revise German translation of some help messages.

Prefer 'Sender' to 'Programm'.


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@36522 b3059339-0415-0410-9bf9-f77b7e298cf2
Revise German translation of some help messages.

Translate 'seek' as 'positionieren'.


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@36523 b3059339-0415-0410-9bf9-f77b7e298cf2