Currently we can use this syntax ubd<n>[<flags>]=file1,file2. However, writing
things as
	ubd0=~/Uml/file1,~/Uml/file2
does not work; in fact, the shell won't expand the second '~', since it's not
at a path beginning; possibly even other shell expansions don't work here. So
simply allow using, instead of the ',' separator, the ':' separator.

The ',' separator can still be used to preserve backward compatibility.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade_spam@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>