Warner Losh e1a4e3fa37 Allow option aliasing. Lines of the form:
OLD_OPT = NEW_OPT

in options* files will now map OLD_OPT to NEW_OPT with a friendly
message.  This is indented for situations where we need to preserve an
interface in the config file in an upwards compatible fashion on a
stable branch.

Reviewed by:	nwhitehorn@
MFC after:	3 days
2010-04-15 15:10:46 +00:00
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