remove testing == stable mirror anachronism.  don't do transcation stuff in lower level update_foo().

don't error out on expired keys.  fix override_type and priority tables too.  location::%s::suites is a valuelist.  don't use cnf.find when we need the result

Suite::%s::{Architectures,Components}, OverrideType, Section, Location::%s::Suites and Urgency::Valid become ValueLists not Lists.

read all configs when utils is imported, allowing utils to make use ofconfig values.  Also use those config values in init.  Two small bugs fixedin shania and jenna.

make use of utils.{warn,fubar}.  clean up extraneous \n's in fernanda and natalie.  remove old override code from rhona.