Import Debian changes 7.0.56-3+deb8u8

tomcat7 (7.0.56-3+deb8u8) jessie-security; urgency=high

  * Team upload.
  * Add BZ57544-infinite-loop.patch: It was found that https GET requests could
    trigger an infinite loop and thus cause a denial-of-service.
    (Closes: #854551)