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Use ccmake, or cmake -i, or cmake -DPOLLER=EPOLL, for example

We append each line to a string, and when the MOTD is
complete, we send that string at once.

That’s ugly, and we need to sanitize everything properly, and also handle
these special messages.

Because the XMPP component connection is only available locally, the XMPP
servers proably only listen on 127.0.0.1 instead of 0.0.0.0.

And now we handle namespaces, yay.
And a nice little test.

Handle conversion errors properly by inserting � instead.  Add a binary
header to provide portable way to write binary literals (I like them) Also
add a test file.  ref #2404

Also correctly respond to PING with the id, escape some XML content, but not
always

Add all useful classes as well: Jid, Iid, IrcChannel, IrcUser etc to
properly keep the informations about what we receive from the IRC server.

Only handle the MUC join stanza, and send the list of users in the IRC
channel to the XMPP user, and the IRC channel’s topic, for now.

Generate events on stanza and stream open/close.
Create Stanza and serialize them.

Note: XML namespaces are not handled yet.