Only count table lookups when we're actually processing packets.

PR:		183462
Submitted by:	Sven-Thorsten Dietrich <thebigcorporation at gmail.com>
Reviewed by:	bms
MFC after:	1 month
Yacc cleanup; no functional changes.

Sponsored by:	The FreeBSD Foundation
Remove unused variable.

Sponsored by:	The FreeBSD Foundation
Simplify.

Sponsored by:	The FreeBSD Foundation
Make iscsictl(8) properly handle (optional) semicolons in iscsi.conf,
instead of ignoring them and echoing them to stdout.

Sponsored by:	The FreeBSD Foundation
The log_whatever() routines don't accept NULL for format strings,
so mark them as __printflike instead of __printf0like.

Sponsored by:	The FreeBSD Foundation