mlmmjadmin upgrade tutorial (RESTful API server used to manage mlmmj mailing list)

Summary

Upgrade mlmmjadmin

cd /root/
wget https://github.com/iredmail/mlmmjadmin/archive/2.1.tar.gz
tar zxf 2.1.tar.gz
cd mlmmjadmin-2.1/tools/
bash upgrade_mlmmjadmin.sh