Add message archive management to prosody

src/freedombone

 	echo 'install_tox_client' >> $COMPLETION_FILE
 }
 
+function update_prosody_modules {
+	if [ ! -d $INSTALL_DIR/prosody-modules ]; then
+		return
+	fi
+	if [ ! -d /usr/lib/prosody ]; then
+		return
+	fi
+
+	cd $INSTALL_DIR/prosody-modules
+	hg pull
+	hg update
+
+	# support onion addresses
+	if [ -f $INSTALL_DIR/prosody-modules/mod_onions/mod_onions.lua ]; then
+		cp $INSTALL_DIR/prosody-modules/mod_onions/mod_onions.lua /usr/lib/prosody/modules/mod_onions.lua
+	fi
+
+	# message archive management
+	# https://modules.prosody.im/mod_mam.html
+	if [ -d cp $INSTALL_DIR/prosody-modules/mod_mam ]; then
+		cp $INSTALL_DIR/prosody-modules/mod_mam/*.lua /usr/lib/prosody/modules
+	fi
+}
+
 function install_xmpp {
 	if [[ $SYSTEM_TYPE == "$VARIANT_WRITER" || $SYSTEM_TYPE == "$VARIANT_MAILBOX" || $SYSTEM_TYPE == "$VARIANT_CLOUD" || $SYSTEM_TYPE == "$VARIANT_SOCIAL" || $SYSTEM_TYPE == "$VARIANT_MEDIA" || $SYSTEM_TYPE == "$VARIANT_DEVELOPER" || $SYSTEM_TYPE == "$VARIANT_MESH" ]]; then
 		return
 	fi
+
+	update_prosody_modules
+
 	if grep -Fxq "install_xmpp" $COMPLETION_FILE; then
 		return
 	fi
 	fi
 
 	# install the onions module
-	cp $INSTALL_DIR/prosody-modules/mod_onions/mod_onions.lua /usr/lib/prosody/modules/mod_onions.lua
+	update_prosody_modules
 	if [ ! -f /usr/lib/prosody/modules/mod_onions.lua ]; then
 		echo $'mod_onions.lua could not be copied to the prosody modules directory'
 		exit 63952
 		echo '  "tls"; -- Enable mod_tls' >> /etc/prosody/conf.avail/xmpp.cfg.lua
 		echo '  "saslauth"; -- Enable mod_saslauth' >> /etc/prosody/conf.avail/xmpp.cfg.lua
 		echo '  "onions"; -- Enable chat via onion service' >> /etc/prosody/conf.avail/xmpp.cfg.lua
+		echo '  "mam"; -- Message archive management' >> /etc/prosody/conf.avail/xmpp.cfg.lua
 		echo '}' >> /etc/prosody/conf.avail/xmpp.cfg.lua
 		echo '' >> /etc/prosody/conf.avail/xmpp.cfg.lua
 		echo 'c2s_require_encryption = true' >> /etc/prosody/conf.avail/xmpp.cfg.lua