Parser: Display token where parser fell down

For example I misspelled device protocol
  bird: bird.conf, line 11 (nearby 'demice'): syntax error

It would be better to display whole err line. We can read it from
config->err_file_name again and display the line at config->err_lino.
32 jobs for cf-err-show-line in 6 minutes and 53 seconds (queued for 6 seconds)
latest
Status Job ID Name Coverage
  Image
passed #162670
dind allowed to fail
docker_centos-6-amd64

00:00:21

passed #162671
dind allowed to fail
docker_centos-7-amd64

00:00:21

passed #162660
dind allowed to fail
docker_debian-7-amd64

00:00:22

passed #162664
dind allowed to fail
docker_debian-7-i386

00:00:22

passed #162661
dind allowed to fail
docker_debian-8-amd64

00:00:24

passed #162665
dind allowed to fail
docker_debian-8-i386

00:00:22

passed #162662
dind allowed to fail
docker_debian-9-amd64

00:00:23

passed #162666
dind allowed to fail
docker_debian-9-i386

00:00:20

passed #162663
dind allowed to fail
docker_debian-testing-amd64

00:00:22

passed #162667
dind allowed to fail
docker_debian-testing-i386

00:00:21

passed #162668
dind allowed to fail
docker_fedora-25-amd64

00:00:21

passed #162669
dind allowed to fail
docker_fedora-26-amd64

00:00:21

passed #162672
dind allowed to fail
docker_opensuse-42_3-amd64

00:00:21

passed #162673
dind allowed to fail
docker_ubuntu-14_04-amd64

00:00:21

passed #162674
dind allowed to fail
docker_ubuntu-16_04-amd64

00:00:21

 
  Build
passed #162681
amd64 linux docker
build-centos-6-amd64

00:01:26

passed #162682
amd64 linux docker
build-centos-7-amd64

00:01:17

passed #162675
amd64 linux docker
build-debian-7-amd64

00:01:27

passed #162686
amd64 linux docker
build-debian-7-i386

00:01:21

passed #162676
amd64 linux docker
build-debian-8-amd64

00:01:32

passed #162687
amd64 linux docker
build-debian-8-i386

00:01:33

passed #162677
amd64 linux docker
build-debian-9-amd64

00:01:32

passed #162688
amd64 linux docker
build-debian-9-i386

00:01:29

passed #162678
amd64 linux docker
build-debian-testing-amd64

00:01:32

passed #162689
amd64 linux docker
build-debian-testing-i386

00:01:33

passed #162679
amd64 linux docker
build-fedora-25-amd64

00:01:32

passed #162680
amd64 linux docker
build-fedora-26-amd64

00:01:32

passed #162690
amd64 freebsd
build-freebsd-11-amd64

00:05:29

passed #162691
i386 freebsd
build-freebsd-11-i386

00:05:44

passed #162683
amd64 linux docker
build-opensuse-42_3-amd64

00:01:27

passed #162684
amd64 linux docker
build-ubuntu-14_04-amd64

00:01:21

passed #162685
amd64 linux docker
build-ubuntu-16_04-amd64

00:01:26