Log Message:-----------Add documentation section "Using C++ for Extensibility".
Craig Ringer
Modified Files:-------------- pgsql/doc/src/sgml: extend.sgml (r1.38 -> r1.39) (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/extend.sgml?r1=1.38&r2=1.39)
