cut's compilation time by half!
- build a common version.c in libcommon.a
- don't build version.h - nothing uses it
- comment out the ifdef INFO and -DINFO stuff - it's always compiled in
- XXX: don't compile mopprobe with -DNODL (which actually changes the
compilation of stuff in common/*). nothing else does this, and it
meant that mopprobe would have had different behaviour. if this behaviour
is desired, a workaround can be put in place
