Clean up memory leak in config file on off nominal paths when glob is allowed

Clean up memory leak in config file on off nominal paths when glob is allowed

If a system allows for its usage, Asterisk will use glob to help parse
Asterisk .conf files. The config file loading routine was leaking the memory
allocated by the glob() routine when the config file was in an unmodified
or invalid state.

This patch properly calls globfree in those off nominal paths.

(closes issue ASTERISK-21412)
Reported by: Corey Farrell
patches:
  config_glob_leak.patch uploaded by Corey Farrell (license 5909)
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Merged revisions 386672 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 386677 from http://svn.asterisk.org/svn/asterisk/branches/11

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@386685 65c4cc65-6c06-0410-ace0-fbb531ad65f3