[PATCH] xineliboutput: new SVDRP command PRIM (like in softhddevice)

Hi,

I don't have a sourceforge account, so I post it here.
This patch adds the SVDRP command "PRIM <n>" to xineliboutput.
Called without a number, it will switch the primary device to xineliboutput, otherwise it will try so switch the primary device to the given number.

softhddevice has a similar command. With this it will become easier to switch between both plugins:

svdrpsend plug xineliboutput prim
svdrpsend plug softhddevice prim

Lars.

Thank you!

Lars.