Log Message:
-----------
Add URL for introduction to multibyte programming in C.
Modified Files:
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pgsql/src/backend/utils/mb:
README (r1.7 -> r1.8)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/mb/README?r1=1.7&r2=1.8)