- Update to 1.6.1.18
    -
    - The following are a few of the issues resolved by community developers:
    -
    - * Make sure to clear red alarm after polarity reversal.
    - (Closes issue #14163. Reported, patched by jedi98. Tested by mattbrown,
    - Chainsaw, mikeeccleston)
    -
    - * Fix problem with duplicate TXREQ packets in chan_iax2.
    - (Closes issue #16904. Reported, patched by rain. Tested by rain, dvossel)
    -
    - * Update documentation to not imply we support overriding options.
    - (Closes issue #16855. Reported by davidw)
    -
    - * Modify queued frames from Local channels to not set the other side to
        up.
    - (Closes issue #16816. Reported, tested by jamhed)
    -
    - * For T.38 reINVITEs treat a 606 the same as a 488.
    - (Closes issue #16792. Reported, patched by vrban)
    -
    - For a full list of changes in this releases, please see the ChangeLog:
    - http://downloads.asterisk.org/pub/telephony/asterisk/ChangeLog-1.6.1.18