gotten pretty far out of synch with -current over the last year or so,
this catches us up for everything that makes sense.

There are several whitespace only changes here. In an ideal world I
would have had time to seperate them out, however I did not. Most of
them are included to be consistent with -current, some of them are
"improvements" that happened while I was adding things back.

Of particular note:
/var/log/auth.log
/var/run and /var/spool cleanup in rc
Early and late rc.sysctl runs
New mailq/queurun support in daily scripts

in /etc/sysctl.conf.

Reviewed by:	imp, jkh

	* All variables are now embraced: ${foo}

	* All comparisons against some value now take the form:
	  [ "${foo}" ? "value" ]
	  where ? is a comparison operator

	* All empty string tests now take the form:
	  [ -z "${foo}" ]

	* All non-empty string tests now take the form:
	  [ -n "${foo}" ]

Submitted by:	jkh

    log_in_vain:
	log_in_vain turns on logging for packets to ports for which
	there is no listener.
    rc.sysctl:
	A generic way to set sysctl values.  It reads /etc/syslog.conf
	and sets values based on that.  No /etc/syslog.conf has been
	checked in yet, and I've not added this to the makefile yet
	until I get more feedback.

Reviewed by: -current, -hackers and bde especially