[SUGGESTIONS] s/-unstable/-dev/ for 3.3.x release cycle

[Leif Hedstrom]

I'd like to suggest that starting with v3.3.0, we make our development 
releases named e.g.

    trafficserver-3.3.0-dev

Any objections? The reason is that "unstable" has bad connotation in the 
communities in general, and corporations in particular. And we really 
want people to have the guts to try our dev releases, even though they 
can sometimes be a bit risky.

-- Leif