psqlodbc - psqlodbc: I may have introduced a bug in the last change

Log Message:
-----------
I may have introduced a bug in the last change which may cause an
infinite loop of trial to use the same (should be lower) version of
protocols. Also try to use SSPI service for SSL support when libpq
is unavailable.

Modified Files:
--------------
    psqlodbc:
        connection.c (r1.165 -> r1.166)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/connection.c.diff?r1=1.165&r2=1.166)
        dlg_wingui.c (r1.19 -> r1.20)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/dlg_wingui.c.diff?r1=1.19&r2=1.20)
        loadlib.c (r1.9 -> r1.10)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/loadlib.c.diff?r1=1.9&r2=1.10)
        loadlib.h (r1.5 -> r1.6)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/loadlib.h.diff?r1=1.5&r2=1.6)
        version.h (r1.112 -> r1.113)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/version.h.diff?r1=1.112&r2=1.113)