Log Message:
Update to 317:

  Patch #317 - 2015/03/27

    adapt example for exec-formatted from
    Lukas Zapletal's webpage to manual (Debian
    #780008).

    add a short usage section to the xterm manual, including
    notes on setting the window title (Debian #742477).

    revise a change made to ICH in patch #314 to address limit-checks
    (reports/testcases by Zoltán Keri and Joe
    Peterson, also reported by Christian Weisgerber).