pgsql: Move USE_WIDE_UPPER_LOWER define to c.h, and remove TS_USE_WIDE

Log Message:
-----------
Move USE_WIDE_UPPER_LOWER define to c.h, and remove TS_USE_WIDE and use
USE_WIDE_UPPER_LOWER instead.

Modified Files:
--------------
    pgsql/src/backend/tsearch:
        regis.c (r1.4 -> r1.5)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/tsearch/regis.c?r1=1.4&r2=1.5)
        ts_locale.c (r1.7 -> r1.8)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/tsearch/ts_locale.c?r1=1.7&r2=1.8)
        wparser_def.c (r1.14 -> r1.15)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/tsearch/wparser_def.c?r1=1.14&r2=1.15)
    pgsql/src/backend/utils/adt:
        formatting.c (r1.141 -> r1.142)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/formatting.c?r1=1.141&r2=1.142)
        oracle_compat.c (r1.79 -> r1.80)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/oracle_compat.c?r1=1.79&r2=1.80)
    pgsql/src/include:
        c.h (r1.226 -> r1.227)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/c.h?r1=1.226&r2=1.227)
    pgsql/src/include/tsearch:
        ts_locale.h (r1.5 -> r1.6)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/tsearch/ts_locale.h?r1=1.5&r2=1.6)