Enhance MALLOC_DEBUG CLI commands.

* Fixed CLI "memory show allocations" misspelling of anomalies option.
The command will still accept the original misspelling.

* Miscellaneous tweaks to CLI "memory show allocations" command output
format.

* Made CLI "memory show summary" summarize by line number instead of by
function if a filename is given.

* Made CLI "memory show summary" sort its output by filename or
function-name/line-number depending upon request.

* Miscellaneous tweaks to CLI "memory show summary" command output format.
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Merged revisions 376758 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 376759 from http://svn.asterisk.org/svn/asterisk/branches/10
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Merged revisions 376760 from http://svn.asterisk.org/svn/asterisk/branches/11


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@376761 65c4cc65-6c06-0410-ace0-fbb531ad65f3