Log Message:
-----------
Document that CREATE TYPE names should not begin with an underscore,
rather than being disallowed.
Modified Files:
--------------
pgsql/doc/src/sgml/ref:
create_type.sgml (r1.64 -> r1.65)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/create_type.sgml.diff?r1=1.64&r2=1.65)