This update for varnish fixes the following issues:
Security issue fixed:
CVE-2019-15892: Fixed a potential denial of service by sending crafted HTTP/1 requests (boo#1149382).
Non-security issues fixed:
Updated the package to release 6.2.1.
Added a thread pool watchdog which will restart the worker process if scheduling tasks onto worker threads appears stuck. The new parameter 'threadpoolwatchdog' configures it.
Disabled error for clobbering, which caused bogus error in varnishtest.
This update was imported from the openSUSE:Leap:15.0:Update update project.