Enhancements:
- http: MAPI/HTTP protocol support
- http: Raise max_router_connections & max_rpc_stub_threads limits
to cope with reconnect storms from midb and zcore. - doc: manpage for autodiscover
Changes:
- all daemons: Disabled the ip6_container and ip6_filter plugins
for now; the default settings block too many connections.
Fixes:
- http: fix crash when user_default_lang is unset
- imap: advertise STARTTLS when indeed supported
- all daemons: avoid rejecting IPv6 connections from long addresses