Move the creation of ctxt to the Lwt job for subcommand 'fetch'
Move the creation of ctxt to the Lwt job for subcommand 'fetch'

Ignore-this: b101675ccc012e61dcd0f22e98930427

darcs-hash:20110518154623-4d692-f37c4605a8880b306428eb03c999c86c056a9c98

ocaml/oasis-db,ocaml/oasis-db,avsm/oasis-db-mirror,ocaml/oasis-db,avsm/oasis-db-mirror,avsm/oasis-db-mirror,avsm/oasis-db-mirror