Validates a project's regex. We can't do this exhaustively, so we:
Make sure the new regex can match existing projects
Check if the new regex matches a list of banned characters "naively", that is, construct
strings with the banned character at the beginning, middle and end and see if the regex matches,
rejecting it if so.
Check if the new regex contains non-ascii characters
Nested Class Summary
Nested classes/interfaces inherited from interface com.atlassian.validation.Validator