pgsql: ynced parser and keyword list.

Log Message:
-----------
ynced parser and keyword list.
Implemented EXEC SQL UNDEF.
Applied first version of the regression test patch by Joachim Wieland <joe@mcknight.de>.

Modified Files:
--------------
    pgsql/src/interfaces/ecpg:
        ChangeLog (r1.314 -> r1.315)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/ChangeLog.diff?r1=1.314&r2=1.315)
    pgsql/src/interfaces/ecpg/ecpglib:
        connect.c (r1.31 -> r1.32)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/ecpglib/connect.c.diff?r1=1.31&r2=1.32)
        error.c (r1.13 -> r1.14)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/ecpglib/error.c.diff?r1=1.13&r2=1.14)
        execute.c (r1.55 -> r1.56)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/ecpglib/execute.c.diff?r1=1.55&r2=1.56)
    pgsql/src/interfaces/ecpg/include:
        ecpglib.h (r1.67 -> r1.68)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/include/ecpglib.h.diff?r1=1.67&r2=1.68)
    pgsql/src/interfaces/ecpg/preproc:
        keywords.c (r1.73 -> r1.74)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/preproc/keywords.c.diff?r1=1.73&r2=1.74)
        pgc.l (r1.147 -> r1.148)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/preproc/pgc.l.diff?r1=1.147&r2=1.148)
        preproc.y (r1.326 -> r1.327)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/preproc/preproc.y.diff?r1=1.326&r2=1.327)
    pgsql/src/interfaces/ecpg/test:
        Makefile (r1.53 -> r1.54)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/Makefile.diff?r1=1.53&r2=1.54)