If offline then send received xmpp messages to email

src/freedombone-app-xmpp

     if [ -d $INSTALL_DIR/prosody-modules/mod_privacy_lists ]; then
         cp $INSTALL_DIR/prosody-modules/mod_privacy_lists/*.lua /usr/lib/prosody/modules
     fi
+
+    # If offline then send messages to email
+    if [ -d $INSTALL_DIR/prosody-modules/mod_offline_email ]; then
+        cp $INSTALL_DIR/prosody-modules/mod_offline_email/*.lua /usr/lib/prosody/modules
+    fi
 }
 
 function upgrade_xmpp {
         echo '  "privacy_lists"; -- Privacy lists' >> /etc/prosody/conf.avail/xmpp.cfg.lua
         echo '  "blocking"; -- Blocking command' >> /etc/prosody/conf.avail/xmpp.cfg.lua
         echo '  "roster"; -- Roster versioning' >> /etc/prosody/conf.avail/xmpp.cfg.lua
+        echo '  "offline_email"; -- If offline send to email' >> /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