Oliver

Update Gitolite to support symbolic-ref command and restrict it to the gitlab user

2

This is a dependency for enabling GitLab to securely update the default branch.

Enhancement: Detect/Warn on multilevel cycles

4

This doesn't affect Greybel at all, but it can completely hang a script in-game. It requires a certain amount of cyclic references - simply doing `Foo = {}; Foo.__isa =...

This is a fun one: ```Lua Foo = {} Foo.__isa = Foo map.errCheck = function() return self end function a = new Foo //-- or just Foo. if a.errCheck isa...