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

Add missing static keywords to rwall(1)

Revert most part of 200420 as requested, as more review and polish is
needed.

Remove unneeded header includes from usr.bin/ except contributed code.

Tested with: make universe

Sync program's usage() with manpage's SYNOPSIS.

More xdrproc_t warnings.

ANSIify function definitions.
Add some constness to avoid some warnings.
Remove use register keyword.
Deal with missing/unneeded extern/prototypes.
Some minor type changes/casts to avoid warnings.

Reviewed by: md5

Revert/fix the most controversial parts of the last commit:

1) place __FBSDID() correctly IAW style(9).

2) revert (and slightly correct) a "complex" expression in an if()
statement.

ANSIfication, WARNS and lint cleanup.

Cleanup this code a bit by attempting to sync it up with NetBSD and
with each other.

Reviewed by: markm, dwmalone

$Id$ -> $FreeBSD$

PR: bin/8680

Minor adjustments to rwall.c. Increased the size of a couple of char
arrays and replaced a potentially dangeerous strcpy/strcat with snprintf().

Use err(3). Add usage().

Revert $FreeBSD$ to $Id$

Make the long-awaited change from $Id$ to $FreeBSD$

This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.

Fix bug found by new prototypes. The code was passing an int to a function
that was expecting a "struct timeval" on the stack. I've guessed at a
suitable replacement timeout.

Remove trailing whitespace.

This commit was generated by cvs2svn to compensate for changes in r2347,
which included commits to RCS files with non-trunk default branches.

rwall from FreeBSD 1.1.5.1
Reviewed by: Geoff
Submitted by: Christopher G. Demetriou