bug#16911: [PATCH] grep: fix bugs with -i and titlecase

[Paul Eggert]

[I've reopened 16911 since the bug's not fixed on OS X.]

Here's my guess.  In glibc's en_US locale, 'Lj' is considered to be both 
uppercase and lowercase; but in OS X's en_US locale, it's considered to 
be neither uppercase nor lowercase.  If so, the attached gnulib patch 
should fix the problem (though I can't easily test this).  Could you 
please give it a try?

By the way, I'd like to remove the need for grep's local differences 
from the glibc regex code.  I assume it's there only to pacify GCC's 
warnings flags, and we can do that with pragmas in gnulib.  One fix at a 
time, though.

regex-osx.diff
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