Search ARB trac

Search bugreports:

Search complete trac:

Google trac:

Google sourcedoc:

Google ARB code:

• Using the first google search allows to search in the ARB source code (as shown in trac). SLOW
• Using the second google search allows to search in the ARB doxygen output (also contains source).
• Using the third google search searches in several arbsrc.tgz mirrored over the world - but unfortunately not in our  latest_builds. I've announced it at googles code search, let's see if they manage to scan it.