What's the diference with the field sys_user.groups (there we can save many groups with a comma) and the table sys_group? And what happened with the sys_user.default_group? What is the final answer?
The table sys_group contains a list of all groups. The database field sys_user.groups conatins a comma separated list of all groups where this user is a member. The default_group of a user is the "Default group" of this user, so if this user adds a new record of any type,e.g. a website, this record is owned by his userid and the default group. The permission system in ISPConfig works like the Linux permission system where you also have a userid, a groupid and a default group of a user. But do not modify these tables directly if you want that your software works with future ispconfig releases. Only use the API to add clients and other records.
