Fix syslog-ng.
Fix syslog-ng.

The system() source in the default syslog-ng config file does
not work in Docker because it tries to access /proc/kmsg,
which is not allowed due to Docker's privileges. We replace
it by a source that only reads from /dev/log.

ThePFMind/baseimage-docker,oouyang/baseimage-docker,metavige/baseimage-docker,zanderbaldwin/ubuntu-base,ksmaheshkumar/baseimage-docker,donpiekarz/baseimage-docker,endersonmaia/baseimage-docker,adriagalin/baseimage-docker,jedisct1/phusion-baseimage-latest,StepsAway/baseimage-docker,gcetusic/baseimage-docker,oouyang/baseimage-docker,jedisct1/phusion-baseimage-latest,erulabs/baseimage-docker,phusion/baseimage-docker,REDDOXX/baseimage-docker,snowygoose/baseimage-docker,ThePFMind/baseimage-docker,alaskaicygiant/baseimage-docker,szaydel/influxdb-docker,h2ocube/baseimage-docker,gitinsky/baseimage-docker,tsilenzio/docker-base,gmacario/baseimage-docker,tsilenzio/docker-base,datacratic/baseimage-docker,OrcaHealth/baseimage-docker,ngpestelos/baseimage-docker,imjerrybao/baseimage-docker,minurc/baseimage-docker,pingworks/docker-ubuntu-baseimg,remeeting/baseimage-docker,lsm/baseimage-docker,LewisW/baseimage-docker,ngpestelos/baseimage-docker,remeeting/baseimage-docker,jeckhart/baseimage-docker,mba811/baseimage-docker,endersonmaia/baseimage-docker,lifei/baseimage-docker,erulabs/baseimage-docker,phusion/baseimage-docker,NCCUCS-PLSM/docker-baseimage,ndelitski/baseimage-docker,snowygoose/baseimage-docker,REDDOXX/baseimage-docker,ksmaheshkumar/baseimage-docker,metavige/baseimage-docker,AtkinsChang/docker-baseimage,clickyab/base-image,StepsAway/baseimage-docker,NCCUCS-PLSM/docker-baseimage,atyenoria/baseimage-docker,hopsoft/baseimage-docker,zanderbaldwin/ubuntu-base,lsm/baseimage-docker,floze/raspbian-baseimage,hopsoft/baseimage-docker,imjerrybao/baseimage-docker,jeckhart/baseimage-docker,gitinsky/baseimage-docker,youprofit/baseimage-docker,lifei/baseimage-docker,beyondthestory/baseimage-docker,atyenoria/baseimage-docker,mba811/baseimage-docker,szaydel/influxdb-docker,adriagalin/baseimage-docker,gcetusic/baseimage-docker,nathanabrewer/baseimage-docker,pingworks/docker-ubuntu-baseimg,clickyab/base-image,bsmr-docker/baseimage-docker,beyondthestory/baseimage-docker,minurc/baseimage-docker,LewisW/baseimage-docker,bsmr-docker/baseimage-docker,donpiekarz/baseimage-docker,datacratic/baseimage-docker,ndelitski/baseimage-docker,youprofit/baseimage-docker,alaskaicygiant/baseimage-docker,floze/raspbian-baseimage,gmacario/baseimage-docker,rydnr/baseimage-docker,nathanabrewer/baseimage-docker,OrcaHealth/baseimage-docker,rydnr/baseimage-docker,h2ocube/baseimage-docker,AtkinsChang/docker-baseimage