Fixes	#1398

(And Happy New Year!)

bother with compat-crap for srandomdev()

srandomdev() any more

Hit by:	scoof

headers, we need to purge all traces of it, before we construct our
503 response, otherwise we risk failing to set important headers,
such as "Connection: close".

Fixes #416
(again)

rather than just the ttl.

Fixes		#1268
Spotted by:	daghf
Partial fix by:	gquintard

is not the same as a positive TTL any more.

"shortlived" test puts the object in Transient.

Patch by:	gquintard
Fixes		#1387

Fixes #1323
Spotted & fix by:	gquintard

we cannot just throw the storage away, we have to wait for the
fetch-thread to go away, possibly in response to a new "abandon"
signal.

Spotted first by:	scoof
Fixes	#1391

right order:  Init is done first to last "inifin", Fini is done
in opposite order, last to first.

This replaces the several ad-hoc facilities we had.

random bits of memory to each other.

I have added a "len" field to the vmod_priv structure and used that
for BLOB's.

We may need some memory-mgt beauty/convenience functions for this.

A new parameter, $ban_lurker_age, sets a minimum age bans must
have before the lurker will touch them.  This way the lurker
stays out of the "rush" that happens right after a ban has been
added.

Another new parameter, $ban_lurker_batch, determines how many
objects the lurker will examine, before it takes a $ban_lurker_sleep
in order to not monopolize CPU.

duplicated bans while it runs.

Stumbled on by:	scoof
Fixes #1390

Spotted by: 	martin

Eliminate some dead code and make sure that the tail-pruner runs,
also when the lurker is busy.

it basically didn't work as intended any more.

output.

Fixes: #1381