Bug#636783: minimum discussion period

[Ian Jackson <ijackson@chiark.greenend.org.uk>]

I would like to present an improved proposal for a minimum TC
discussionn period, which will allow the committee to move quickly
when there is consensus (at least, procedural consensus) within the
committee:

 * Constitution 6.3(1), delete
    -   There is no minimum discussion period;
   and replace it with a new paragraph inserted into the end of
   6.3(1):
    +   There is a minimum discussion period of 5 days.
    +   However, the persion calling a vote may waive the minimum
    +   discussion period; in that case the vote may be cancelled by
    +   any member of the committee, if they do so within 5 days of
    +   the vote being called.

Ian.