Improving the FreeBSD-9 boot menu

[Warren Block]

The patch in PR 160818 makes some clarifications and improvements to 
the new boot menu.  Obviously this is not for 9.0-RELEASE, just wanting 
to get it out there so people can look at it.

http://www.freebsd.org/cgi/query-pr.cgi?pr=160818

Among other things, the patch removes the word "boot" from options that 
don't actually boot.  The options are lined up, and enabled options are 
drawn in reverse video when loader_color=1 is set in /boot/loader.conf.