pgsql: Code review for GRANT CONNECT patch.

Log Message:
-----------
Code review for GRANT CONNECT patch.  Spell the privilege as CONNECT not
CONNECTION, fix a number of places that were missed (eg pg_dump support),
avoid executing an extra search of pg_database during startup.

Modified Files:
--------------
    pgsql/doc/src/sgml:
        client-auth.sgml (r1.88 -> r1.89)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/client-auth.sgml.diff?r1=1.88&r2=1.89)
        ddl.sgml (r1.56 -> r1.57)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ddl.sgml.diff?r1=1.56&r2=1.57)
        func.sgml (r1.315 -> r1.316)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/func.sgml.diff?r1=1.315&r2=1.316)
        user-manag.sgml (r1.34 -> r1.35)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/user-manag.sgml.diff?r1=1.34&r2=1.35)
    pgsql/doc/src/sgml/ref:
        grant.sgml (r1.53 -> r1.54)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/grant.sgml.diff?r1=1.53&r2=1.54)
        revoke.sgml (r1.37 -> r1.38)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/revoke.sgml.diff?r1=1.37&r2=1.38)
    pgsql/src/backend/catalog:
        aclchk.c (r1.126 -> r1.127)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/catalog/aclchk.c.diff?r1=1.126&r2=1.127)
    pgsql/src/backend/utils/adt:
        acl.c (r1.132 -> r1.133)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/acl.c.diff?r1=1.132&r2=1.133)
    pgsql/src/backend/utils/init:
        postinit.c (r1.163 -> r1.164)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/init/postinit.c.diff?r1=1.163&r2=1.164)
    pgsql/src/bin/pg_dump:
        dumputils.c (r1.26 -> r1.27)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_dump/dumputils.c.diff?r1=1.26&r2=1.27)
    pgsql/src/bin/psql:
        tab-complete.c (r1.150 -> r1.151)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/tab-complete.c.diff?r1=1.150&r2=1.151)
    pgsql/src/include/utils:
        acl.h (r1.94 -> r1.95)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/utils/acl.h.diff?r1=1.94&r2=1.95)