#30 Man page fixes

[Christian Kastner]

Hi,

please find attached a patch with some smaller fixes for the avarace.1 and ice-gdb.1 man pages. Mostly, it's just a proper escaping of minus signs.

We have this applied downstream in Debian, and we'd appreciate it if you could include this upstream.

[Joerg Wunsch]

Applied in rev 380, thanks!