Log Message:
Update pen to the latest version (0.17.2, which almost a year old now).

070912	Added sanity check to init() to make sure that servers_max
	is large enough for the number of servers specified on the
	command line.
	Released 0.17.2.

070829	Faster string duplication courtesy of Nigel Horne.

070502	Updated automake links.

070212	Updated INSTALL with instructions for increasing the number
	of connections on Windows.

061204	Include server weight in response to "penctl servers" command.
	Set server weight on command line. Server is specified as
	host:port:maxconn:hard:weight.

060627	Bugfix by Chris Elsworth: server_by_weight would never
	consider blacklisted servers, which kept them blacklisted
	indefinitely.
	Released 0.17.1.

051230	Added code by Chris Elsworth for kqueue support. Configure
	with --with-kqueue to enable.
	Released 0.17.0.

051215	Changed the configure option for ssl to
	--with-experimental-only-ssl.
	Released 0.16.0.

040709	Added an "abuse server" for naughty clients that have been
	denied access by an acl. Works similar to the emergency server,
	use command-line option "-B host:port" to enable.