Software `/` code `/` prosody

# #667 MUC message with subject and body SHALL NOT be interpreted as a subject change

[Client] Romeo
	password: password
	jid: romeo@localhost

-----

Romeo connects

# and creates a room
Romeo sends:
	<presence to="issue667@conference.localhost/Romeo">
		<x xmlns="http://jabber.org/protocol/muc"/>
	</presence>

Romeo receives:
	<presence from="issue667@conference.localhost/Romeo">
		<x xmlns="http://jabber.org/protocol/muc#user">
			<status code="201"/>
			<item affiliation="owner" role="moderator" jid="${Romeo's full JID}"/>
			<status code="110"/>
		</x>
	</presence>

Romeo receives:
	<message type="groupchat" from="issue667@conference.localhost">
		<subject/>
	</message>

Romeo sends:
	<message to="issue667@conference.localhost" type="groupchat">
		<subject>Greetings</subject>
		<body>Hello everyone</body>
	</message>

Romeo receives:
	<message type="groupchat" from="issue667@conference.localhost/Romeo">
		<subject>Greetings</subject>
		<body>Hello everyone</body>
	</message>

Romeo sends:
	<message to="issue667@conference.localhost" type="groupchat">
		<subject>Something to talk about</subject>
	</message>

Romeo receives:
	<message type="groupchat" from="issue667@conference.localhost/Romeo">
		<subject>Something to talk about</subject>
	</message>

Romeo sends:
	<presence to="issue667@conference.localhost/Romeo">
		<x xmlns="http://jabber.org/protocol/muc"/>
	</presence>

Romeo receives:
	<presence from="issue667@conference.localhost/Romeo">
		<x xmlns="http://jabber.org/protocol/muc#user">
			<item affiliation="owner" role="moderator" jid="${Romeo's full JID}"/>
			<status code="110"/>
		</x>
	</presence>

# These have delay tags but we ignore those for now
Romeo receives:
	<message type="groupchat" from="issue667@conference.localhost/Romeo">
		<subject>Greetings</subject>
		<body>Hello everyone</body>
	</message>

Romeo receives:
	<message type="groupchat" from="issue667@conference.localhost/Romeo">
		<subject>Something to talk about</subject>
	</message>

Romeo disconnects
author	Kim Alvefur <zash@zash.se>
date	Thu, 06 Dec 2018 17:54:50 +0100
child	9706:d3c2c9248734