the session workspace to compress struct sess.

Instead one can start gdb on the compiled binary and ask it:

	print sizeof(struct sess)
	$1 = 192

we can reserve the space on the workspace when needed.

scale to parallism.

We don't return 413/414 (yet?) but we have a specific counter for this
now.  Whether this is enough it's something we need to finalise.

into cache_acceptor.c where it belongs.

onto a worker thread (falling back to the current (=acceptor) thread
if the pool is empty.

Use this to save a little bit of stack on common requests.

Rename pool_func_t to task_func_t.

Annotate the task functions with __match_proto__

from FlexeLint.

socket (re)open code.

in order to prevent other processes from stealing them.

(We have to close & reopen when the client dies, there is no unlisten(2))

Thank you, fgs

a test-case to cover this case.

on using the same ones across restarts.