MFH: r447818

Enable COOKEDMODE for more versatile soundcard support; use GitHub

Detailed log:

• Add COOKEDMODE option that turns on SNDCTL_DSP_COOKEDMODE. Without the cooked mode Jack's OSS driver currently fails for some soundcards (it chooses wrong sample rate). It's better to have COOKEDMODE=on by default since it often appears broken otherwise. Professionals probably want COOKEDMODE=off, after they make sure their soundcard works with jack.
• Switch to github for fetching the sources.
• Include the merged upstream pull request #60 to enable the realtime mode (-R).
• Add USES=autoreconf (github source doesn't include a configure script)
• Install more manpages.

PR: 220785
Submitted by: yuri@rawbw.com

Approved by: portmgr (feld)