On FreeBSD this means that for instance "top -H" will show the
varnish threads as "cache-foo" for various values of foo, hopefully
giving us another debugging hint.



git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@2293 d4fa192b-c00b-0410-8231-f00ffab90ce4