[Gzz] PEG 201 issues

[Benja Fallenstein]

From PEG 201:

   At some point after this, the architect (tjl) will make a decision
   to either accept, force revision, declare rejected, or declare
   irrelevant (e.g. other PEGs superceded the current one). No-one
   else may change the status of the PEGs to any of these categories.

Authors should be able to withdraw their PEGs or declare them irrelevant 
themselves. This should be possible even if the PEG is not current yet 
(I have to finish a PEG before it can be declared irrelevant? wtf?)

- Benja