Currently when you ssh to host you will not see ENV variables set. This was mentioned earlier in #54 and solution is tested.
Additional rationale: currently you can't see docker link ENV variables inside ssh, so you need to load this file every time you connect to container. I would say that expected behavior is to preserve them in services that are provided at default (cron/ssh)
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.
