Using a filename as argument to firewall_type in rc.conf,
	results in a boot failure because ipfw will not accept a -q
	option if a filename is given.  I have worked around this
	by replacing the last line in rc.firewall with
	ipfw ${firewall_type} </dev/null

	The -q (or redirection) should be needed since the leading flush in
	the firewall config file makes the boot hang otherwise.  However,
	when the config is coming from a file, there appears to be no
	way to make ipfw accept a -q.

Fix: 

The first time I ran into this I did a minor rewrite to ipfw
	so it would parse arguments correctly; it currently uses getopt 
	improperly.  Then I did a make world and lost my fixes :-(  
	The removal of -q from that last command line, and redirect of 
	stdin from /dev/null at least works around the problem, though 
	it isn't a real fix.
How-To-Repeat: 
	See Description