Revert r330897:

This was intended to be a non-functional change. It wasn't. The commit
message was thus wrong. In addition it broke arm, and merged crypto
related code.

Revert with prejudice.

This revert skips files touched in r316370 since that commit was since
MFCed. This revert also skips files that require $FreeBSD$ property
changes.

Thank you to those who helped me get out of this mess including but not
limited to gonzo, kevans, rgrimes.

Requested by: gjb (re)

Partial merge of the SPDX changes

These changes are incomplete but are making it difficult
to determine what other changes can/should be merged.

No objections from: pfg

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

libc: spelling fixes.

Mostly on comments.

libc: do not include <sys/types.h> where <sys/param.h> was already included

According to style(9):
> normally, include <sys/types.h> OR <sys/param.h>, but not both.
(<sys/param.h> already includes <sys/types.h> when LOCORE is not defined).

Add support for '_' occurring at the beginning or end of a name
component.

PR: 176093
Submitted by: landonf__at__bikemonkey.org
MFC after: 1 week

Update our stub resolver to final version of libbind.

Obtained from: ISC

Add an option to enforce strict RFC 1034 compliance.

PR: kern/129477

Allow underscore in domain names while resolving. While having underscore
is a violation of RFC 1034 [STD 13], it is accepted by certain name servers
as well as other popular operating systems' resolver library.

Bugs are mine.

Obtained from: ume
MFC after: 2 weeks

Merge BIND 9.4.1 into main chunk.

MFC after: 2 weeks

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

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

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

This commit was generated by cvs2svn to compensate for changes in r156952,
which included commits to RCS files with non-trunk default branches.

Vendor import of BIND 9.3.2