psqlodbc - psqlodbc: Correct the flow of trial of multi protocols and

Log Message:
-----------
Correct the flow of trial of multi protocols and fix related bugs about handling of connection errors.

Modified Files:
--------------
    psqlodbc:
        connection.c (r1.166 -> r1.167)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/connection.c.diff?r1=1.166&r2=1.167)
        connection.h (r1.87 -> r1.88)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/connection.h.diff?r1=1.87&r2=1.88)
        setup.c (r1.44 -> r1.45)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/setup.c.diff?r1=1.44&r2=1.45)
        socket.c (r1.58 -> r1.59)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/socket.c.diff?r1=1.58&r2=1.59)
        socket.h (r1.37 -> r1.38)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/socket.h.diff?r1=1.37&r2=1.38)
        version.h (r1.113 -> r1.114)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/version.h.diff?r1=1.113&r2=1.114)