bug#16912: [PATCH] no longer use CSET for non-UTF8 locale in DFA engine

[Norihiro Tanaka]

I have added several modifications to the patch.

First, I fixed the bug for titlecase.

Second, I changed it so that prefered replacement to OR to CSET in order
to reduce a number of states.

Third, I modified comments in source code and put drafts of commit
messages in the patch.

Norihiro

patch.txt
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