Create a permission system to limit account privileges

[retrixe]

There should be a way to set permissions for each account. I'm not sure how this will work yet.

Permission ideas:

• Ability to manage other people's accounts.
• Ability to change one's own password.
• Ability to access a server's status.
• Ability to perform specific actions on the server (this would just be console access, statistics access and files access).
• Maybe even more granular permissions for per-folder access? This will need a lot of thinking for a good permission design.

[retrixe]

#13 adds the "actions" syntax to define particular actions users can do, for the purpose of fine-grained configuration of the new logging feature. These can be reused for permissions, however, they are not nearly as fine-grained as we would like.

#13 (comment) is an idea to address this by adding "generics" of sorts to the syntax. We should implement this or try another solution when adding this feature to octyne.