Google Code-in

Our webchat is currently sending a nearly empty list of features supported:

<iq type="result" id="..." to="gci@chat.copyleftgames.org/user">
    <query xmlns="http://jabber.org/protocol/disco#info" node="https://candy-chat.github.io/candy/#kR9jljQwQFoklIvoOmy/GAli0gA=">
        <feature var="http://jabber.org/protocol/caps"/>
    </query>
</iq>

Add the following features to this list:

• http://jabber.org/protocol/disco#info
• http://jabber.org/protocol/disco#items
• http://jabber.org/protocol/muc
• http://jabber.org/protocol/muc#user
• urn:xmpp:attention:0
• urn:xmpp:avatar:metadata
• urn:xmpp:avatar:data
• urn:xmpp:avatar:metadata+notify