Add multiple groups to users

[pcerol]

Hi!

I'd like to request a feature, to be able to add multiple groups to a user.

A scenario would be when you have 3 different "groups" of PC's users need to remote to. Then you can put the PC's in Group 1, Group 2 and Group 3 with a descriptive groupname.
When adding users i can just assign them the corresponding groups they need to be able to access. Otherwise i need to create different usergroups depending on the different combinations of reachable remote PC's a specific user need. Would be much easier to just "tag" the groups they need access.

[rustdesk]

duplicate: #649, please append there.