flag regex as variable

[vonDowntown]

This would make finding and checking for flags undependant from flagformat.
If you are using different flagformats for the same challenge in different ctfs.
probably over-engineering

So possible would be: self.flag_regex

[domenukk]

The flag is handed to the checker by the engine, there should never be a reason to match a regex, instead look for the actual flag.

[domenukk]

I think this can be closed (?)