Add possibility to group services

[dol]

A feature of supervisor is to group certain programs in a group. This is especially useful in combination with supervisorctl to restart a certain group.

supervisorctl restart mygroup:*

IMHO this is not that easy to implement. I would implement a new 'define' to do that and store the configuration in separate file for each group.
To avoid naming collisions with the server names, I would suggest a separate groups folder within the $conf_dir. Or a special prefix/suffix of all groups to avoid this problem.

[estahn]

👍