TestBed extensions

I'm contemplating a piece of automation to help manage the more complex
testbed layers.

A piece of code to recursively scan the code files and pull out the
unique dependency chains of nested #if...#endif.
Reducing the entire codebase to its preprocessor code and performing
some of the minor actions as it goes.

 From the chain output its relatively easy to manually or otherwise
construct the minimal graphs of tests needed to cover all compile paths.

To work cleanly it would require a standardization of the .h safety
wrapper defines used in squid sources. This only applies to headers
bundled with squid and does not affect anything else operationally.

**** Proposed wrapper define format ****

#ifndef SQUID_PATH_FILENAME_H
#define SQUID_PATH_FILENAME_H
   ...
#endif /* SQUID_PATH_FILENAME_H */

so that each .h file was wrapped with a define indicating its current
location in the sources.

Not new, most files do this already with much variation on exact texts,
some do not. Just proposing it be formally adopted.

Amos

-- 
Please be using
   Current Stable Squid 2.7.STABLE5 or 3.0.STABLE10
   Current Beta Squid 3.1.0.1