Add configure --package-db= flag to use specific package db
Add configure --package-db= flag to use specific package db

Should allow satisfying deps from the given package db and should register
into that db. It is not thoroughly tested however.

20080113232536-adfee-0753878c933160e339c026cffd4b5fa396c46058.gz

dcreager/cabal,dcreager/cabal