size_t is 64 bit.

Fixes: #2780

Varnish Cache 6.1.0 has been released, and we are moving
back to trunk. A 6.1 branch was created from the preivious
"Prepare for.." commit.

I consider it too late for a vtc, but this has been tested manually
with ulimit -n 40. Example errors (tcp, uds)

         0 SessError      - a0 127.0.0.1 8080 3 24 Too many open files
	 0 SessError      - a1 0.0.0.0 0 5 24 Too many open files

Fixes: #2777

facility.

Much more could be said, but I hope this helps understand the
overall concepts a bit better.

I've also taken the freedom to reword "cluster" in the director
concept to "load balancer" because at least in my experience, the
former is used more for some form of tighter binding between nodes,
while the latter is a common term for what directors usually do.

Text mostly taken from ecdebdc7

We copy vmods using unique filenames for ages

Ref: 3cf58766

Original text from 2014: 920541a8