pgsql: Convert three more guc settings to enum type: - Mailing list pgsql-committers

Log Message:
-----------
Convert three more guc settings to enum type:
default_transaction_isolation, session_replication_role and regex_flavor.

Modified Files:
--------------
    pgsql/src/backend/utils/adt:
        regexp.c (r1.79 -> r1.80)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/regexp.c?r1=1.79&r2=1.80)
    pgsql/src/backend/utils/misc:
        guc.c (r1.440 -> r1.441)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/misc/guc.c?r1=1.440&r2=1.441)
    pgsql/src/include/regex:
        regex.h (r1.29 -> r1.30)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/regex/regex.h?r1=1.29&r2=1.30)
    pgsql/src/include/utils:
        guc.h (r1.92 -> r1.93)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/utils/guc.h?r1=1.92&r2=1.93)