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

Fix prototype of dbm_open().

The last argument of dbm_open() should be a mode_t according to POSIX;
not an int.

Reviewed by: pfg, kib
Differential Revision: https://reviews.freebsd.org/D6650

Let dbm's datum::dptr use the right type.

According to POSIX, it should use void *, not char *. Unfortunately, the
dsize field also has the wrong type. It should be size_t. I'm not going
to change that, as that will break the ABI.

Reviewed by: pfg
Differential Revision: https://reviews.freebsd.org/D6647

Remove the Berkeley clause 3's.
Add a few $FreeBSD$

Namespace: dbm_forder() and dbm_dirfno() are BSD extensions.

Breath deep and take __P out of the system include files.

# This appears to not break X11, but I'm having problems compiling the
# glide part of the server with or without this patch, so I can't tell
# for sure.

Add missing declarations.

PR: 12058
Submitted by: Mikhail Teterin <mi@aldan.algebra.com>

Don't reference ndbm(3) manpage. Everything is covered by db(3).

This commit was generated by cvs2svn to compensate for changes in r1539,
which included commits to RCS files with non-trunk default branches.

BSD 4.4 Lite Include Sources