Several fixes to the extenpatternmatchnew logic.

Several fixes to the extenpatternmatchnew logic.

1. Differentiate between literal characters in an extension
and characters that should be treated as a pattern match. Prior to
these fixes, an extension such as NNN would be treated as a pattern,
rather than a literal string of N's.

2. Fixed the logic used when matching an extension with a bracketed
expression, such as 2[5-7]6.

3. Removed all areas of code that were executed when NOT_NOW was
#defined. The code in these areas had the potential to crash, for
one thing, and the actual intent of these blocks seemed counterproductive.

4. Fixed many many coding guidelines problems I encountered while looking
through the corresponding code.

5. Added failure cases and warning messages for when duplicate extensions
are encountered.

6. Miscellaneous fixes to incorrect or redundant statements.

(closes issue #14615)
Reported by: steinwej
Tested by: mmichelson

Review: http://reviewboard.digium.com/r/194/

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@188901 65c4cc65-6c06-0410-ace0-fbb531ad65f3