The reasons are discussed in #71.
Namely:
- transfers are self-paced, TCP clients are divided among threads
- due to the nature of DNS, most of the connections should be active
- if not, it is probably an attack, long idling connections are disconnected
- even then the performance degradation is not so severe

fixes #71

refs #54

issue #64

Removed 'pidfile' config option in favour of 'rundir' for later
storage of UNIX sockets and other stuff.
Default of 'rundir' is $(localstatedir)/run/knot
Default of 'storage' is $(sharedstatedir)/knot

refs #36

Change-Id: Ic80408a129bf42e97b9e88392d318e89cfbad3e5

Change-Id: I53e7e891daf7fc4583bfecdb14276ae9e4b55147

Change-Id: Ib8a55d6df1266ca33d3fd6f1283489df3fa28d8a

Change-Id: I904cf4ea0a99652f2a2370fde17af770b1273dc4

and use absolute path in build directory for zscanner tests.

Change-Id: I75b6d02b93d28cc9ff1354d5432d10b20cf734b5

Clang compiler does not support this flag but emits a warning only,
so the option was used anyway.

norefs

Change-Id: I865551a5ac7b605123e0f9df0fc786a844d849ce

(This implementation has EXTRA-FLAGS option.)

norefs

Change-Id: I456b89ce8a7b2624b0196013527682fce13078e6

Change-Id: I56f931a598184aa9802914cc6dc68668e2d5a4a2

Change-Id: I99e14ee1c42599f4b9d13e97824aa454025f0219

Change-Id: Idb34e5dc231760fa1b0eb8e28250c2f390b43f71

Rename the option --enable-shortlog to the option --enable-microseconds-log.

Change-Id: I864ea1f21f4c0aa0daef57143b58ae4307b3c7ca

Removed checks were not used in code.

Change-Id: Ia3a08500c7f15739a1dc16eaceb8cab9d27c42be

It is not required to delete original scanner.c now, if you want to generate fast parser.

Change-Id: Ifbbc5a6a596b2d9f2238b53d117c86535bb4d111

Shorter log format uses just seconds precision.

refs #2398

Fixed off-by-one.

Change-Id: Ie8fa417ac75c97be9be917833464b13591a661f2

Configure option --enable-fastscanner enables G2 FSM type.

Change-Id: I414a84fd02871bf78445009a82adfd2e355d67ce

Change-Id: I77615a328dce98e39964c567b55cf7c4dca331e2