Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

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

Update our stub resolver to final version of libbind.

Obtained from: ISC

Use C comments since we now preprocess these files with CPP.

__p_rcode_syms is declared as external in resolv.conf, so it cannot be
redeclared as static in res_debug.c.

Make __p_rcode_syms global and add it to Symbol map. The rest of
__p_??_syms are already global.

Choice of FBSD_1.0 version for these debug symbols seems strange and
should be revisited before symbol versioning is enabled for libc.so.7.

Nuke some compatibility crufts of resolver for 6.X and earlier.

X-MFC after: never

Upgrade res_update(3) and the friends to BIND9's one excluding TSIG
support.

X-MFC after: never

Expose res_update and friends again. At least, ports/mail/spamilter
uses them.
Now, we have res_nupdate and res_nmkupdate as well, but they are
still based on our old resolver for binary backward compatibility.
So, they don't provide new features such as TSIG support.

Reported by: pointyhat via kris

Add __collate_load_error and __collate_range_cmp to the list of
FBSDprivate locale symbols. These functions are needed by
libcompat.

Add _cleanup to the list of stdio FBSDprivate symbols. Some
third party applications use this. This will be removed and
replaced by fcloseall() once libc version is bumped.

Add _res to the list of resolv symbols.

Found by: portbuilder runs (thanks Kris!)

- Merge our local changes.
- Exclude unnecessary functions for us.