Stop avahi when exiting mesh

src/freedombone-client

   echo '        mv /usr/local/share/toxic/DHTnodes.internet /usr/local/share/toxic/DHTnodes' >> $batman_script
   echo '    fi' >> $batman_script
   echo '' >> $batman_script
+  echo '    if [ -f /bin/systemctl ]; then' >> $batman_script
+  echo '        systemctl stop avahi-daemon' >> $batman_script
+  echo '    else' >> $batman_script
+  echo '        service avahi-daemon stop' >> $batman_script
+  echo '    fi' >> $batman_script
+  echo '' >> $batman_script
   echo '    sudo rm -f /tmp/meshtype' >> $batman_script
   echo '' >> $batman_script
   echo '    # kill processes' >> $batman_script