Log Message:
-----------
Make procedural language handler reference C-language function docs.
Based on suggestions from Jonathan Leto and Joshua Tolley.
Modified Files:
--------------
pgsql/doc/src/sgml:
plhandler.sgml (r1.10 -> r1.11)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/plhandler.sgml?r1=1.10&r2=1.11)