Merged revisions 75053 via svnmerge from

Merged revisions 75053 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/1.4

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r75053 | russell | 2007-07-13 14:11:26 -0500 (Fri, 13 Jul 2007) | 20 lines

Merged revisions 75052 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/1.2

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r75052 | russell | 2007-07-13 14:10:00 -0500 (Fri, 13 Jul 2007) | 12 lines

(closes issue #9660)
Reported by: mmacvicar
Patches submitted by: bbryant, russell
Tested by: mmacvicar, marco, arcivanov, jmhunter, explidous

When using a TDM400P (and probably other analog cards) there was a chance that
you could hang up and pick the phone back up where it has been long enough to
be not considered a flash hook, but too soon such that the device reports that
it is busy and the person on the phone will only hear silence.  This patch
makes chan_zap more tolerant of this and gives the device a couple of seconds
to succeed so the person on the phone happily gets their dialtone.

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@75054 65c4cc65-6c06-0410-ace0-fbb531ad65f3