add additional encoder and output to musicpd

[Fritjof]

Hi,

I need to add *lame* and *vorbis* as additional encoder and *shout* as
additional output.

According to the Makefile this should already be included - at least
*lame* and *vorbis*. But in the binary its not:

$ musicpd --version
[...]
encoder plugins:
    null wave flac

Looks like shoutcast can be enabled via *PORT_OPTIONS:MSHOUTCAST*.
Do I have to change the entire Makefile for that or is there a simpler
way?

--f.