This has been done in order for NaaS to work:
r35353 | jack.van.ooststroom | 2013-09-05 20:18:56 +0200 (Thu, 05 Sep 2013) | 1 line
Fixed JIRA PUSH-275 : Make the creation of a MainServlet in the ICEpushServlet more flexible
The ICEpushServlet subclass in NaaS overrides the newMainServlet(...) method in order to instantiate the MainServlet subclass in NaaS.
Marking this one as FIXED.