Hello All, Today I tried to use RequestCycle.get().urlFor(...) from a thread started around heavy task (I have preserved Application, Session and RequestCycle in ThreadContext)
Surprisingly I got NPE due to `Request.getClientUrl()` was throwing NPE or was `null` and caused NPE I would like to modify [1] to preserve original clientUrl and return it Would it be OK? Does it worth PR? [1] https://github.com/apache/wicket/blob/master/wicket-request/src/main/java/org/apache/wicket/request/Request.java#L190 -- WBR Maxim aka solomax
