mod_posix: Move everything to util.startup
This allows greater control over the order of events.
Notably, the internal ordering between daemonization, initialization of
libunbound and setup of signal handling is sensitive.
libunbound starts a separate thread for processing DNS requests.
If this thread is started before signal handling has been set up, it
will not inherit the signal handlers and instead behave as it would have
before signal handlers were set up, i.e. cause the whole process to
immediately exit.
libunbound is usually initialized on the first DNS request, usually
triggered by an outgoing s2s connection attempt.
If daemonization happens before signals have been set up, signals may
not be processed at all.
# MUC: Members-only rooms kick members who deregister
[Client] Romeo
jid: user@localhost
password: password
[Client] Juliet
jid: user2@localhost
password: password
-----
Romeo connects
Romeo sends:
<presence to="room@conference.localhost/Romeo">
<x xmlns="http://jabber.org/protocol/muc"/>
</presence>
Romeo receives:
<presence from='room@conference.localhost/Romeo'>
<x xmlns='http://jabber.org/protocol/muc#user'>
<status code='201'/>
<item jid="${Romeo's full JID}" affiliation='owner' role='moderator'/>
<status code='110'/>
</x>
</presence>
Romeo receives:
<message type='groupchat' from='room@conference.localhost'><subject/></message>
# Submit config form, set the room to members-only
Romeo sends:
<iq id='config1' to='room@conference.localhost' type='set'>
<query xmlns='http://jabber.org/protocol/muc#owner'>
<x xmlns='jabber:x:data' type='submit'>
<field var='FORM_TYPE'>
<value>http://jabber.org/protocol/muc#roomconfig</value>
</field>
<field var='muc#roomconfig_membersonly'>
<value>1</value>
</field>
</x>
</query>
</iq>
Romeo receives:
<iq id="config1" from="room@conference.localhost" type="result">
</iq>
# Romeo adds Juliet to the member list
Romeo sends:
<iq id='member1' to='room@conference.localhost' type='set'>
<query xmlns='http://jabber.org/protocol/muc#admin'>
<item affiliation='member' jid="${Juliet's JID}" />
</query>
</iq>
Romeo receives:
<message from='room@conference.localhost'>
<x xmlns='http://jabber.org/protocol/muc#user'>
<item jid="${Juliet's JID}" affiliation='member' />
</x>
</message>
Romeo receives:
<iq from='room@conference.localhost' id='member1' type='result'/>
# Juliet connects, and joins the room
Juliet connects
Juliet sends:
<presence to="room@conference.localhost/Juliet">
<x xmlns="http://jabber.org/protocol/muc"/>
</presence>
Juliet receives:
<presence from="room@conference.localhost/Romeo" />
Juliet receives:
<presence from="room@conference.localhost/Juliet" />
Juliet receives:
<message type='groupchat' from='room@conference.localhost'><subject/></message>
Romeo receives:
<presence from="room@conference.localhost/Juliet" />
# Tired of Romeo's company, Juliet unregisters from the room
Juliet sends:
<iq type='set' to='room@conference.localhost' id='unreg1'>
<query xmlns='jabber:iq:register'>
<remove/>
</query>
</iq>
Juliet receives:
<presence type='unavailable' from='room@conference.localhost/Juliet'>
<x xmlns='http://jabber.org/protocol/muc#user'>
<status code='321'/>
<item affiliation='none' role='none' jid="${Juliet's full JID}" />
<status code='110'/>
</x>
</presence>
Juliet receives:
<iq type='result' from='room@conference.localhost' id='unreg1'/>
Romeo receives:
<presence type='unavailable' from='room@conference.localhost/Juliet'>
<x xmlns='http://jabber.org/protocol/muc#user'>
<status code='321'/>
<item affiliation='none' role='none' jid="${Juliet's full JID}" />
</x>
</presence>
Romeo disconnects
Juliet disconnects