Merged revisions 80183 via svnmerge from

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

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r80183 | russell | 2007-08-21 13:42:15 -0500 (Tue, 21 Aug 2007) | 7 lines

Don't record SIP dialog history if it's not turned on.  Also, put an upper
limit on how many history entires will be stored for each SIP dialog.  It is
currently set to 50, but can be increased if deemed necessary.
(closes issue #10421, closes issue #10418, patches suggested by jmoldenhauer,
 patches updated by me)
(Security implications documented in AST-2007-020)

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@80184 65c4cc65-6c06-0410-ace0-fbb531ad65f3