MFC r327289:
rpc.sprayd: Bring some changes from NetBSD.

Most notable, other than some style issues:
CVS 1.11:
do not use LOG_CONS.
CVS 1.13:
consistently use exit instead of return in main().
use LOG_WARNING instead of LOG_ERR for non critical errors.

Obtained from: NetBSD

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Fix most cases where the address of an int is passed to a function expecting a
socklen_t * argument.

Port to TI/RPC and/or IPV6.

Submitted by: Jean-Luc Richier <Jean-Luc.Richier@imag.fr>

Spell void * as void * rather than caddr_t. This is complicated by the
fact that caddr_t is often misspelled as char *.

Sponsored by: DARPA, NAI Labs

o __P removal
o use new style prototypes and function definitions
o signal handlers need an argument. Mark it unused.

$Id$ -> $FreeBSD$

Do not terminate syslog() messages with a dot, as others daemons do.

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.

This commit was generated by cvs2svn to compensate for changes in r13240,
which included commits to RCS files with non-trunk default branches.

Obtained from: NetBSD
imported the rpc.sprayd from NetBSD - it is used by the new spray
command for network analysis