Log Message:
-----------
Allow psql variables to be interpolated with literal or identifier escaping.
Loosely based on a patch by Pavel Stehule.
Modified Files:
--------------
pgsql/doc/src/sgml/ref:
psql-ref.sgml (r1.236 -> r1.237)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/psql-ref.sgml?r1=1.236&r2=1.237)
pgsql/src/bin/psql:
psqlscan.l (r1.31 -> r1.32)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/psqlscan.l?r1=1.31&r2=1.32)