[Bug 211394] [exp-run] POSIX conformance: make functions return void

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=211394

--- Comment #5 from commit-hook at freebsd.org ---
A commit references this bug:

Author: ed
Date: Sun Jul 31 08:05:15 UTC 2016
New revision: 303580
URL: https://svnweb.freebsd.org/changeset/base/303580

Log:
  Fix up setgrent(3) to have a POSIX-compliant prototype.

  Just like with freelocale(3), I haven't been able to find any piece of
  code that actually makes use of this function's return value, both in
  base and in ports. The reason for this is that FreeBSD seems to be the
  only operating system to have such a prototype. This is why I'm deciding
  to not use symbol versioning for this.

  It does seem that the pw(8) utility depends on the function's typing and
  already had a switch in place to toggle between the FreeBSD and POSIX
  variant of this function. Clean this up by always expecting the POSIX
  variant.

  There is also a single port that has a couple of local declarations of
  setgrent(3) that need to be patched up. This is in the process of being
  fixed.

  PR:           211394 (exp-run)

Changes:
  head/include/grp.h
  head/lib/libc/gen/getgrent.3
  head/lib/libc/gen/getgrent.c
  head/usr.sbin/pw/pw_vpw.c
  head/usr.sbin/pw/pwupd.h

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