Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

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

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

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

Document how to enable strict RFC 1034 enforcements.

PR: kern/129477

Per Regents of the University of Calfornia letter, remove advertising
clause.

# If I've done so improperly on a file, please let me know.

Document return values for res_query and res_search.
h_errno is not an extern int, just a macro providing an integer lvalue.

PR: doc/50573
Submitted by: Ronald F.Guilmette <rfg@monkeys.com>
Reviewed by: trhodes
MFC after: 3 days

Use a prototype for res_init().

MFC after: 3 days

Expand *n't contractions.

Sort sections.

Mechanically kill hard sentence breaks.

Markup, grammar, and spelling fixes.

Make the resolver(3) and many associated interfaces much more reentrant.
The getaddrinfo(3), getipnodebyname(3) and resolver(3) can coincide now
with what should be totally reentrant, and h_errno values will now
be preserved correctly, but this does not affect interfaces such as
gethostbyname(3) which are still mostly non-reentrant.

In all of these relevant functions, the thread-safety has been pushed
down as far as it seems possible right now. This means that operations
that are selected via nsdispatch(3) (i.e. files, yp, dns) are protected
still under global locks that getaddrinfo(3) defines, but where possible
the locking is greatly reduced. The most noticeable improvement is
that multiple DNS lookups can now be run at the same time, and this
shows major improvement in performance of DNS-lookup threaded programs,
and solves the "Mozilla tab serialization" problem.

No single-threaded applications need to be recompiled. Multi-threaded
applications that reference "_res" to change resolver(3) options will
need to be recompiled, and ones which reference "h_errno" will also
if they desire the correct h_errno values. If the applications already
understood that _res and h_errno were not thread-safe and had their own
locking, they will see no performance improvement but will not
actually break in any way.

Please note that when NSS modules are used, or when nsdispatch(3)
defaults to adding any lookups of its own to the individual libc
_nsdispatch() calls, those MUST be reentrant as well.

mdoc(7): Properly mark C headers.

mdoc(7): Use the new feature of the .In macro.

mdoc(7) police: "The .Fa argument.".

mdoc(7) police: Fixed abuses of the .Ar and .Em macros.

mdoc(7) police: Use the new .In macro for #include statements.

mdoc(7) police: join split punctuation to macro calls.

Remove whitespace at EOL.

mdoc(7) police: removed HISTORY info from the .Os call.

Document more resolver(3) routines: dn_skip() from resolv.h, and
ns_get16(), ns_get32(), ns_put16(), and ns_put32() from arpa/nameser.h.

Markup by: ru
OK'ed by: markm

mdoc(7) police: print some example text with literal font.

Implement EDNS0 support, as EDNS0 support will be made mandatory for
IPv6 transport-ready resolvers/DNS servers. Need careful configuration
when enable it. (default config is not affected).
See manpage for details.

XXX visible symbol __res_opt() is added, however, it is not supposed to be
called from outside, libc minor is not bumped.

Obtained from: KAME/NetBSD

mdoc(7) police: split punctuation characters + misc fixes.

Prepare for mdoc(7)NG.

Introduce ".Lb" macro to libc manpages.

More libraries manpages updates following.

$Id$ -> $FreeBSD$

Add $Id$, to make it simpler for members of the translation teams to
track.

The $Id$ line is normally at the bottom of the main comment block in the
man page, separated from the rest of the manpage by an empty comment,
like so;

.\" $Id$
.\"

If the immediately preceding comment is a @(#) format ID marker than the
the $Id$ will line up underneath it with no intervening blank lines.
Otherwise, an additional blank line is inserted.

Approved by: bde

Removed occurrences of consecutive repeated words (such as "the the").

Fixed bitrot in prototypes in synopsis.

Fixed #include and/or prototype bugs in synopsis.

Sort cross references.

Doc updates and cleanups made with the bind-4.9.4 update some time ago.
I thought I had committed these, but it seems not.

back out last two changes, this caused the mandoc pages to be replaced by
man pages. I'll fold in the real changes in a seperate commit.

The last commit failed part-way through, re-add the generated
resolver man pages.