Log Message:
-----------
Add an explicit caution about how to use pg_do_encoding_conversion with
non-null-terminated input. Per discussion with ITAGAKI Takahiro.
Modified Files:
--------------
pgsql/src/backend/utils/mb:
mbutils.c (r1.74 -> r1.75)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/mb/mbutils.c?r1=1.74&r2=1.75)