Remove leftover volatiles

	There used to be a signal handler for received packets.
	It's not needed now that the kernel supports time stamps.

	and one more uptime_t
31 jobs for master in 12 minutes and 6 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Build
passed #45136655
centos-6
centos-6-basic

00:00:56

passed #45136657
centos-6
centos-6-refclocks

00:01:36

passed #45136658
centos-7
centos-7-basic

00:01:41

passed #45136659
centos-7
centos-7-refclocks

00:02:24

passed #45136641
debian-jessie
debian-jessie-basic

00:02:27

passed #45136642
debian-jessie
debian-jessie-refclocks

00:03:25

passed #45136643
debian-stretch
debian-stretch-basic

00:01:34

passed #45136644
debian-stretch
debian-stretch-refclocks

00:02:03

passed #45136639
debian-wheezy
debian-wheezy-basic

00:01:21

passed #45136640
debian-wheezy
debian-wheezy-refclocks

00:02:09

passed #45136660
fedora-26
fedora-26-basic

00:01:37

passed #45136661
fedora-26
fedora-26-refclocks

00:02:00

passed #45136662
fedora-27
fedora-27-basic

00:01:17

passed #45136663
fedora-27
fedora-27-refclocks

00:01:30

passed #45136653
freebsd-11
freebsd-11-basic

00:01:10

passed #45136654
freebsd-11
freebsd-11-refclocks

00:01:38

passed #45136651
gitlab-org
gcc-7-basic

00:01:55

passed #45136652
gitlab-org
gcc-7-refclocks

00:02:03

passed #45136637
gitlab-org
gitlab-basic

00:01:22

passed #45136638
gitlab-org
gitlab-refclocks

00:01:26

passed #45136664
gitlab-org
python3

00:01:27

passed #45136645
ubuntu-1404-lts
ubuntu-1404-lts-basic

00:01:00

passed #45136646
ubuntu-1404-lts
ubuntu-1404-lts-refclocks

00:01:15

passed #45136647
ubuntu-1604-lts
ubuntu-1604-lts-basic

00:01:25

passed #45136648
ubuntu-1604-lts
ubuntu-1604-lts-refclocks

00:01:42

passed #45136649
ubuntu-1710
ubuntu-1710-basic

00:01:10

passed #45136650
ubuntu-1710
ubuntu-1710-refclocks

00:01:34

 
  Test
passed #45272686
docker
codequality

00:04:52

failed #45136665
docker
codequality

00:03:25

 
  Deploy
passed #45136666
gitlab-org
pages

00:03:43

passed pages:deploy

00:00:05