pgsql: SQL:2008 syntax CURRENT_CATALOG, CURRENT_SCHEMA, SET CATALOG, SET

Log Message:
-----------
SQL:2008 syntax CURRENT_CATALOG, CURRENT_SCHEMA, SET CATALOG, SET SCHEMA.

Modified Files:
--------------
    pgsql/doc/src/sgml:
        func.sgml (r1.450 -> r1.451)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/func.sgml?r1=1.450&r2=1.451)
    pgsql/doc/src/sgml/ref:
        set.sgml (r1.92 -> r1.93)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/set.sgml?r1=1.92&r2=1.93)
    pgsql/src/backend/catalog:
        sql_features.txt (r1.27 -> r1.28)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/catalog/sql_features.txt?r1=1.27&r2=1.28)
    pgsql/src/backend/parser:
        gram.y (r2.629 -> r2.630)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/gram.y?r1=2.629&r2=2.630)
        keywords.c (r1.204 -> r1.205)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/keywords.c?r1=1.204&r2=1.205)
    pgsql/src/interfaces/ecpg/preproc:
        preproc.y (r1.377 -> r1.378)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/preproc/preproc.y?r1=1.377&r2=1.378)