WebSockets: callback arity fix for service handler
WebSockets: callback arity fix for service handler

Related to the changes made in c1bdf0223c.

lamptt/ChicagoBoss,aherranz/ChicagoBoss,7i11/ChicagoBoss,frkarl/ChicagoBoss,synlay/ChicagoBoss,ChicagoBoss/ChicagoBoss,solatis/ChicagoBoss,frkarl/ChicagoBoss,uselessd/ChicagoBoss,powermedia/ChicagoBoss,synlay/ChicagoBoss,danikp/ChicagoBoss,7i11/ChicagoBoss,danikp/ChicagoBoss,yunkai/ChicagoBoss,lamptt/ChicagoBoss,solatis/ChicagoBoss,uselessd/ChicagoBoss,ChicagoBoss/ChicagoBoss,aherranz/ChicagoBoss,powermedia/ChicagoBoss,yunkai/ChicagoBoss