Release timing

[Gervase Markham]

Jake wrote:
> I think this is where the branch maintainers thing that Dave was talking
> about may help things. 

I'm not so keen on the branch maintainers idea, because I feel we should 
be collectively responsible for whichever releases we are supporting...

> We set a minimum support timeframe (6 months
> bugfixes, 18 months security) and if a branch maintainer wants to carry
> bugfixes for a year, so be it. 

...and I'd be particularly concerned about it if the choice of which 
branches to support for how long was in the hands of a group of 
different people, instead of being centrally planned.

Gerv