Update x11/x3270 to 3.3.12ga12.

Contains the fix for CVE-2012-5662.

Upstream changes:
-----------------

    [All] Added logic to verify the name in the host certificate.
    [All] Pass all SSL-related parameters to the pr3287 session.
    [x3270] On the Connect menu, made the recent host list a
 pull-right sub-menu, if there is an ibm_hosts file in use.
    [x3270] The -trace option now implies event tracing as well.
    [x3270] Spaces are now allowed in the file transfer dialog local
 file name.
    [all] Corrected issues when invalid Unicode characters are encountered
 during a file transfer.
    [x3270, wc3270] Corrected a crash when tracing without a file, when
 the monitor window was closed.
    [all] Changed the CGCSGID for cp930 (Japanese) 0x080b012c
(2059, 300) to 0x0172012c (370, 300).
Updated x11/x3270 to 3.3.12ga12
Remove ocamlduce; it is unbuildable, dead upstream, and the maintainer
said quite a ways back to just kill it.
-ocamlduce
qmail-smtpd-viruscan-logging.patch disappeared (reported by Nathan
Arthur). Put a copy up on ${MASTER_SITE_LOCAL}.