Merged revisions 74159 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

Closes issue #9186
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r74159 | qwell | 2007-07-09 15:19:28 -0500 (Mon, 09 Jul 2007) | 16 lines

Merged revisions 74158 via svnmerge from 
https://origsvn.digium.com/svn/asterisk/branches/1.2

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r74158 | qwell | 2007-07-09 15:18:15 -0500 (Mon, 09 Jul 2007) | 8 lines

Several chan_zap options were not working on reload because they were arbitrarily
 disallowed when reloading some/most PRI options (such as signalling) was disallowed.

Options such as polarityonanswerdelay and answeronpolarityswitch can safely be changed on a reload.
This corrects that behavior.

Issue 9186, patch by tzafrir.

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@74160 65c4cc65-6c06-0410-ace0-fbb531ad65f3