[RFC] Interim review: typedefs.h / protos.h splitting

Hi all,
  Attached you'll find an interim patch aiming at replicating for
typedefs.h and protos.h the same work I've done for protos.h.

It
- separates structures declarattions into own header files
- transform typedef structs (and plain structs) into classes
- renames some types to CamelCase convention
- adds some (for now empty placeholders) code files for c++-ification
of classes (e.g. CacheMgrPasswd, CustomLog)
- implements the full set of getters/setters for class RequestFlags -
the method names are certainly improveable, advice is sought
- changes some linkage from C to C++
- implements some default constructors and fixes some which were
missing some data members

I'd like to get some feedback before committing more effort to this;
also an interim merge could be useful - the patch is already more than
10klines long.

Thanks!

-- 
    /kinkie