login: wait for a session's end from before each check

A stream opened with a token ends once refused_now refuses it. In a
swarm without a registry, a session ended on this node is kept in memory
(AppState::ended_sessions), and the streams waiting on session_ended are
woken (notify_waiters). credentials_end now makes the Notified it waits
on before each refused_now, the first one included, and not after: a
session ended between a check and the wait is seen at once rather than
at the next change to protocol data.

0 files changed, 0 insertions, 0 deletions