libdokan: Handle libkbfs.NoSuchUserError more gracefully
libdokan: Handle libkbfs.NoSuchUserError more gracefully

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