MFC r291359,r291362:

r291359:

Skip over lines that start with # (comments)

r291362:

r291359 was incorrect. Skip over tokens that start with `#' as fgetln can
return more than one '\n' delimited line in a buffer

Handle empty lines too, just in case

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Non-void function should return a value.

Found by: clang

The NetBSD Foundation has granted permission to remove clause 3 and 4 from
their software.

Obtained from: NetBSD

- add $FreeBSD$.
- do service lookup.
- add options to use gethostbyname(3) or getipnodebyname(3) instead
of getaddrinfo(3).
- add option to do reverse lookup.

This commit was generated by cvs2svn to compensate for changes in r145857,
which included commits to RCS files with non-trunk default branches.

import of parallel name resolution test.

Obtained from: NetBSD