ref: 0f6bac30b894b4a562f72ccffdaa0411b6ac74f3 soju/config d---------
Don't accept any IP as a proxy by default

It's too easy to setup a reverse proxy which doesn't support the PROXY
protocol, or lets the X-Forwarded-For header fields pass through.
Disable this by default.

To restore the previous behaviour, add `accept-proxy-ip localhost` to
the config file.
Switch to go-scfg

We don't use child directives yet, but likely will in the future.
config: make http-origin directive overwrite previous list

Let's be on the safe side and assume the user doesn't meant the union of
all directive values.
Add accept-proxy-ip config directive

This allows to set the list of IPs allowed to act as a proxy. This is
only used for WebSockets right now, but will be expanded to TCP as well
once the PROXY protocol is supported.
Add support for WebSocket connections

WebSocket connections allow web-based clients to connect to IRC. This
commit implements the WebSocket sub-protocol as specified by the pending
IRCv3 proposal [1].

WebSocket listeners can now be set up via a "wss" protocol in the
`listen` directive. The new `http-origin` directive allows the CORS
allowed origins to be configured.

[1]: https://github.com/ircv3/ircv3-specifications/pull/342
Allow multiple listeners, default to ircs

Users can now specify multiple "listen" directives in their
configuration file. If -listen is specified on the CLI, it's added to
the list of listeners.

Listeners are now parsed as URLs. If the scheme is missing "ircs" is
assumed. URLs allow to enable/disable TLS on a per-listener basis and
will be used for Unix sockets too.

The default listening address is changed from irc+insecure://:6667 to
ircs://:6697. This avoids setting up an insecure listener opened to
config: use shlex

This simplifies parsing and allows quoting words.

Closes: https://todo.sr.ht/~emersion/soju/43
Add support for bouncer logs

Add bouncer logs, in a network/channel/date.log format, in a similar
manner to ZNC log module. PRIVMSG, JOIN, PART, QUIT, MODE are logged.

Add a config directive for the logs file, including a way to disable
them entirely.
Rename project to soju
Add SQLite database

Closes: https://todo.sr.ht/~emersion/jounce/9