Add some constness to avoid some warnings.
Remove use register keyword.
Deal with missing/unneeded extern/prototypes.
Some minor type changes/casts to avoid warnings.
Reviewed by: md5
option (try to break at word bounaries) for SUSv3 conformance.
Partially based on the NetBSD version, with the following changes:
- style(9)
- break on <blank>s, not spaces, per POSIX (and GNU)
- when looking for last space on line, search backwards instead of
forwards; less comparisons needed this way.
- use LINE_MAX macro instead of a magic number and a comment saying it is
LINE_MAX.
PR: 36245
Reviewed by: mike
Obtained from: NetBSD (partially)
