libpqtypes - libpqtypes: Renemaned PGinet.sa_len to sa_buf_len due to

Log Message:
-----------
Renemaned PGinet.sa_len to sa_buf_len due to sa_len macros being defined on some systems (like UnixWare) in
sys/socket.h.

Modified Files:
--------------
    libpqtypes:
        ChangeLog (r1.18 -> r1.19)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/libpqtypes/libpqtypes/ChangeLog.diff?r1=1.18&r2=1.19)
    libpqtypes/src:
        libpqtypes.h (r1.17 -> r1.18)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/libpqtypes/libpqtypes/src/libpqtypes.h.diff?r1=1.17&r2=1.18)
        network.c (r1.6 -> r1.7)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/libpqtypes/libpqtypes/src/network.c.diff?r1=1.6&r2=1.7)
        regression-test.c (r1.11 -> r1.12)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/libpqtypes/libpqtypes/src/regression-test.c.diff?r1=1.11&r2=1.12)