[Pgpool-committers] pgpool - pgpool-II: Refactor pcp related header files.

[User T-ishii]

Log Message:
-----------
Refactor pcp related header files. Add libpcp_ext.h which is inteded to be
included by libpcp applications including PostgreSQL C functions.

Modified Files:
--------------
    pgpool-II:
        pool_type.h (r1.16 -> r1.17)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgpool/pgpool-II/pool_type.h?r1=1.16&r2=1.17)
    pgpool-II/pcp:
        pcp.h (r1.7 -> r1.8)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgpool/pgpool-II/pcp/pcp.h?r1=1.7&r2=1.8)

Added Files:
-----------
    pgpool-II/pcp:
        libpcp_ext.h (r1.1)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgpool/pgpool-II/pcp/libpcp_ext.h?rev=1.1&content-type=text/x-cvsweb-markup)