* llabs() is included in FreeBSD since FreeBSD 5.0.
Oldest supported FreeBSD version is 9.3 now.
* stdio.h needs to be explicitly included here for FreeBSD.
I can wrap it in #ifdefs if needed, but I don't think it can hurt other OSes.
* addr config variable works fine on FreeBSD.
* FreeBSD 5.x is really an ancient version and long unsupported, so I think this check for it can be dropped.
* Fix and simplify code to get battery state and charge.
* Add required include on FreeBSD.
* Add needed include on FreeBSD.
* Also populate basename to avoid printing (null) process names.
Repored by fellow FreeBSD user Szabolcs Grof.
luamm is now able to be compiled with both lua 5.1 and 5.2 (assuming 5.2 has backward
compatibility features compiled in). It is my intention to always support at least two versions
of lua.
