/etc/rc.d/devfs modification to allow wildcard device names in /etc/devfs.conf

[Darren Pilgrim]

I recently needed to change the default permissions of some of the "dial
out" serial devices on a system for use with NUT (sysutils/nut port).  For
the sake of efficiency, I wanted to use a wildcard expression only to find
out that /etc/rc.d/devfs doesn't grok sh-style filename globbing.  So I
modified the script.  I wrapped each sub-procedure in the case structure
with a for...done that expands the device string into a list for iteration.
The result is that I can put lines like the following in /etc/devfs.conf:

own	cuad[1,2]*		nut:nut
perm	cuad[1,2]*		0660

The non-wildcard equivalent would be:

own	cuad1			nut:nut
own	cuad1.init		nut:nut
own	cuad1.lock		nut:nut
own	cuad2			nut:nut
own	cuad2.init		nut:nut
own	cuad2.lock		nut:nut
perm	cuad1			0660
perm	cuad1.init		0660
perm	cuad1.lock		0660
perm	cuad2			0660
perm	cuad2.init		0660
perm	cuad2.lock		0660

I wrote two versions of the modification, one takes the device expression
literally (the _literal.patch file), the other explicitly expands it with ls
(the _backticked_ls.patch file).  Both appear to work fine, but IMO the
latter seems a safer approach.  The modifications and testing were done on a
current RELENG_6_0 box where /etc/rc.d/devfs is v1.10.  The v1.11 in -HEAD
is effectively identical, so it should apply cleanly to that version as
well.
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