Decouple Lenny from Unstable

[Beojan Stanislaus]

I understand this isn't the best list for this, but the mail about including 
krypt gave me an idea. I think that once Lenny, or any other release,is 
frozen, it should be decoupled from unstable, because packages only propagate 
manually, in exceptional circumstances, so such a decoupling could mean that 
development could continue on unstable, the bleeding-edge, with frozen 
separately developing to release. This would allow, in this case, for KDE4 to 
be put into unstable without needing to wait for Lenny.