[Patch] Internal functions for testsuite in regex

[Paolo Carlini]

On 10/04/2013 06:04 PM, Paolo Carlini wrote:
> In particular, the new *_testsuite functions, isn't immediately clear 
> in what they differ from the non-_testsuite variants. In any case we 
> should figure out a better name, maybe even *_internal, if we can't 
> find anything more accurate, but it should be self-explaining in terms 
> of their C++ semantics.
Thus, the functions are comparing two different executors. Thus say that 
in the name, like: __regex_search_debug, or __regex_search_compare. And 
please say what they are for in a comment before at least the "primary" 
overload, the one actually carrying out the comparison.

All the other comments live.

Paolo.