plpsm - plpgpsm: holdable cursor support

Log Message:
-----------
holdable cursor support

Modified Files:
--------------
    plpgpsm/src:
        gram.y (r1.40 -> r1.41)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plpsm/plpgpsm/src/gram.y.diff?r1=1.40&r2=1.41)
        pl_exec.c (r1.41 -> r1.42)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plpsm/plpgpsm/src/pl_exec.c.diff?r1=1.41&r2=1.42)
        plpgpsm.h (r1.31 -> r1.32)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plpsm/plpgpsm/src/plpgpsm.h.diff?r1=1.31&r2=1.32)
        scan.l (r1.12 -> r1.13)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plpsm/plpgpsm/src/scan.l.diff?r1=1.12&r2=1.13)
    plpgpsm/src/expected:
        plpgpsm.out (r1.13 -> r1.14)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plpsm/plpgpsm/src/expected/plpgpsm.out.diff?r1=1.13&r2=1.14)
    plpgpsm/src/sql:
        plpgpsm.sql (r1.12 -> r1.13)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plpsm/plpgpsm/src/sql/plpgpsm.sql.diff?r1=1.12&r2=1.13)