kbfs_ops: user access should spawn a rekey-with-prompt request
kbfs_ops: user access should spawn a rekey-with-prompt request

Instead of being stuck waiting for the 10-minute-timeout.

Issue: KBFS-937

keybase/client,keybase/client,keybase/client,keybase/client,keybase/kbfs,keybase/kbfs,keybase/kbfs,keybase/client,keybase/client,keybase/kbfs,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client