pgsql: Document that \t and \x are now settable.
Log Message:
-----------
Document that \t and \x are now settable.
Modified Files:
--------------
pgsql/src/bin/psql:
help.c (r1.129 -> r1.130)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/help.c?r1=1.129&r2=1.130)