Start putting some structure in the sources relating to VCL handling:

Split the runtime support for compiled varnish programs out and give it the
prefix "VRT".

Start using the prefix "VGC" for generated code.

Prefix "VCC" will be for the compiler and "VCL" for calling the compiled and
loaded functions.



git-svn-id: http://www.varnish-cache.org/svn/trunk@207 d4fa192b-c00b-0410-8231-f00ffab90ce4