message-relay-procs: factor out subscription handling from bgdelivery
and chat-procs and provide compatibility for streaming chat modes
with HTTPS.
The message-relay-procs provide two different implementation for
delivering messages to subscribers:
a) via bgdelivery (traditional method): this is, what was used so far,
having the disadvantage that it only works on plain HTTP connections
b) via ns_connchan (new method): ns_connchan is a relatively new feature
of NaviServer which allows transparent reading/writing from connections.
Chat has a new instance variable named "message_relay", which consists
of preferences for the chat connections. So far, the traditional "bgdelivery"
is still the default mode.
bumped version numbers
- xotcl-core 5.10.0d14
- xowiki: 5.10.0d23
