BUG/MEDIUM: mux-h2: Always wakeup streams with no id to avoid frozen streams

This only happens for server streams because their id is assigned when the first
message is sent. If these streams are not woken up, some events can be lost
leading to frozen streams. For instance, it happens when a server closes its
connection before sending its preface.

This patch must be backported to 1.9.
1 file changed