HV-920 Adding a regular expression based URL constraint validator which ...

...needs to be configured via XML or via a ConstraintDefinitionContributor
Interesting - you say Ahaha. I had some misunderstanding around this the other day with Sanne - https://github.com/hibernate/hibernate-search/pull/675#issuecomment-58990369. So we have Ha ha, Aha Aha and apparently Ahaha. What is that, a combination of both? ;-)