Merged revisions 321926 via svnmerge from

Merged revisions 321926 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/1.8

........
  r321926 | rmudgett | 2011-06-03 17:09:36 -0500 (Fri, 03 Jun 2011) | 18 lines

  Asterisk crash when unloading cdr_radius/cel_radius.

  The rc_openlog() API call is passed a string that is used by openlog() to
  format log messages.  The openlog() does not copy the string it just keeps
  a pointer to it.  When the module is unloaded, the string is gone from
  memory.  Depending upon module load order and if the other module then has
  an error, a crash happens.

  * Pass rc_openlog() a strdup'd string with the understanding that there
  will be a small memory leak if the cdr_radius/cel_radius modules are
  unloaded.

  * Call rc_destroy() to free the rc handle memory when the module is
  unloaded.

  JIRA AST-483
  JIRA SWP-3062
........

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@321927 65c4cc65-6c06-0410-ace0-fbb531ad65f3