pgsql: Introduce filtering dictionary support to tsearch.

Log Message:
-----------
Introduce filtering dictionary support to tsearch.  Propagate --nolocale option
to CREATE DATABASE command in pg_regress to allow correct checking of
locale-sensitive contrib modules.

Modified Files:
--------------
    pgsql/src/backend/tsearch:
        ts_parse.c (r1.13 -> r1.14)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/tsearch/ts_parse.c?r1=1.13&r2=1.14)
    pgsql/src/include/tsearch:
        ts_public.h (r1.15 -> r1.16)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/tsearch/ts_public.h?r1=1.15&r2=1.16)
    pgsql/src/test/regress:
        pg_regress.c (r1.63 -> r1.64)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/pg_regress.c?r1=1.63&r2=1.64)