[Pgpool-committers] pgpool - pgpool-II: Do not start internal transaction if taget backend

[User T-ishii]

Log Message:
-----------
Do not start internal transaction if taget backend is only one.
If SAVEPOINT/ROLLBACK TO/RELEASE SAVEPOINT, send to primary only.

Modified Files:
--------------
    pgpool-II:
        pool_proto_modules.c (r1.57 -> r1.58)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgpool/pgpool-II/pool_proto_modules.c?r1=1.57&r2=1.58)
        pool_query_context.c (r1.16 -> r1.17)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgpool/pgpool-II/pool_query_context.c?r1=1.16&r2=1.17)
        pool_query_context.h (r1.6 -> r1.7)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgpool/pgpool-II/pool_query_context.h?r1=1.6&r2=1.7)