ANSI-fy of ranlib, ruptime and rdist [patches]

Hey,
I was browsing around the source code and discovered that a lot of stuff is
still
not ANSI. I was bored, so I decided to patch it, here are the patches:

http://virtus.ath.cx/dfbsd/ruptime.c.diff
http://virtus.ath.cx/dfbsd/ranlib.diff
http://virtus.ath.cx/dfbsd/rdist.diff

While ANSI-fying rdist, I discovered some possible security hazards, which
I have decided to fix aswell, these can be found here:

http://virtus.ath.cx/dfbsd/rdist2.diff

This depends on rdist.diff, which has to be applied first and then
rdist2.diff over it.

Kind regards,
Douwe