When system calls indicate an error they return -1, not some arbitrary
value < 0. errno is only updated in this case. Change all (most?)
callers of syscalls to follow this better, and let's see if

When system calls indicate an error they return -1, not some arbitrary
value < 0. errno is only updated in this case. Change all (most?)
callers of syscalls to follow this better, and let's see if this strictness
helps us in the future.

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Replace log() with logit() since ISO C reserves log() for the math
library and gcc 3.x will complain. Replacement name taken from NetBSD.
espie@ OK.

spaces

ansi, from cloder

from netbsd; update to mrouted 3.8

initial import of NetBSD tree