Forbid robots to index default wiki pages (actually anything last modified by the "trac" users, which should correspond 99% of the time to the set of default wiki pages found in Trac sites other than t.e.o).
Patch by Vaclav Slavik, closes #8876.
Authored by: cboos 2010-02-04
Parent: [r9136]
Child: [r9138]
