Fallback for x86/amd64 architectures using full barrier.

Change-Id: I80e3beaa721653f760f2d0a6d26a80dd422ab618

Change-Id: Ieb580a23436b227fb889197cb3f4857f03ccf7ae

- Simplified and decoupled I/O from processing code.
- Single reader with multiple workers.
- Reader is bound to specific CPU for lowest possible latency.
- Reverted to select() instead of fdset wrapper as epoll/kqueue could
  be quite slower for a single or handful of sockets.
- Reader I/O calls are non-blocking.

General idea is:
- Reader takes free request from a rx_queue
- Receives data and pushes it to the tx_queue
- Worker processes the packets, sends answers and returns the request
  to the rx_queue

Semi lock-free queue is used for communication.
This is measured to be slightly better than singlethreading, as socket
contention could be better predicted - the reader cannot check sockets
for new events when tx_queue is full.

Change-Id: Ifc40889b355404a9e78e10d77c26cb3fc4c58386

Author: Rusty Russel <rusty@rustcorp.com.au>
Licensed under MIT-BSD.

Extended with consumer sleep/wakeup for our use,
where we want the consumers to sleep instead of
racing for new packets.

Change-Id: I37b57befcd98e1da6a485aaf48433dc06c68fa5e

Change-Id: Ib080da4896ab797a6d950545cc6d426fd54fde51

Change-Id: Iceb9613b3bbd4e56e66a52ba8b712f572eb3d81f

NOTE: Full verification will be added in the next release.

refs #2137

Change-Id: I092a8caf1640b5221815051e5cda1d1ec02e7098

refs #2137

Change-Id: I12da030a6f612bba6b9aef3a495448571f876c3d

The PID file needed to be created before with knotc to indicate
starting instance. This is better than knotd creating it, but
it could result in either dropping privileges before starting knotd
or creating PID file in an inaccessible directory.
As of now, knotd drops privileges and creates empty PID file before
loading zones.

Change-Id: Ifb1507b2a922217d4d4608accb1f71dd7be5c0ee

refs #2137

Change-Id: Iaca6cb6f9d4e99a0a9b399d0206cc9773ae6c285

refs #2137

Change-Id: Ic433b8442634171c41defa5e74babc2d745b01bb

refs @2137

Change-Id: I93995c3b308995c00b1bbbef95e1b74fc4c47a19

refs #2137

Change-Id: Iacb0825ef124ca033105010655947a1282844123

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

Change-Id: I864ea1f21f4c0aa0daef57143b58ae4307b3c7ca

Removed checks were not used in code.

Change-Id: Ia3a08500c7f15739a1dc16eaceb8cab9d27c42be

Coverity CID 1005243 and CID 1005244

Change-Id: I29fbc8d82278951064e984eeb08fdb9189136309

NOTE: TSIG verification is still missing

refs #2137

Change-Id: Ic8e4b8d501da880e668046b6cc40cf24c45a1e19

- Not longer needed, since only compilation used it.
- Removed references to 'jobs' and 'compilation' from man.

Change-Id: Icb3919febef5829d9a05b2bcb85f3542d5d9566d

Change-Id: I79bbb3dec44a7566a99ec6ae15a1775ca8723a0c

Change-Id: Ie3849686302de8ba68e1c72aeb6558ee36b49176

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

Change-Id: Ifbbc5a6a596b2d9f2238b53d117c86535bb4d111

kdig: add support for TSIG.

NOTE: AXFR and IXFR are temporary disabled!

refs #2137

Change-Id: I95ebbeec695b7cfa49db53f92306b12e7ef19a84

Change-Id: I38f71b49b9e30fd7c36cbdbe7313ab7ebdef3e12

Change-Id: Ia6b445b4f7e60c5211c04211fa4a9497b8cc54df

- test_rrset_get_rdata fixed
- test_rrset_to_wire fixed - changed test structure init, changed how the values are checked.

Change-Id: Iaa2b1a7d12baf30242fcfcd36e6034ded3e15a2b

refs #2137

Change-Id: I22256c2503cf187307f51e2893aedc794fc88847

refs #2137

Change-Id: Icaaa7f7271ef6cb195eb14afb79e1ae628a40a3d

refs #2137

Change-Id: Ie73e745bcac3c11b627fc7590d1b9fae58d478dd

refs #2137

Change-Id: I38bf2ee10a4691c8e3508713f05728bc7344619a

refs #2413

Change-Id: I5d029c5a9eb655a42f6eaaf23be062e0a8ef96d3

Change-Id: If2be3a6e77163610bd500d8d205343322ba6bdf8

- Added test for rrset_rdata_equal
- Fixed few changed references to RDATA + better info messages.

Change-Id: I8af2be26809d789e5dc0a265aaaa3cfa90c13d60

refs #2137

Change-Id: I22356a2a3a3792b8d4f565ab9f36b7b4cd092827

refs #2137

Change-Id: I1f7ea41724c0410f91280fb5ac1572fba5ad0465

CID:1004286

Change-Id: Ib8799575a16d531dc8ea7f5b62d49854f912dfac

Change-Id: Ib075ce5602cd78ba25e7b770b7b5d8f96add0498

refs #2137

Change-Id: I89ef98879e38631a0fc26930edad1e86cabe3151

Change-Id: I233c4ffda71c84c9d1b2eccd4872644ae04237f6

Change-Id: I294c6abd2930dd9bc54865341900a1956855617d

This speeds up Knot startup when bootstrapping a lot of zones or
when no IXFR is used, as it doesn't have to create journal files
for each zone, only when required (received 'flush' command or
incoming incremental xfer).

Change-Id: I693f360c69172eaa6a51536de1c7efc3ff44aa27