Time handling seems broken #8
Description
When ingesting GELF from "vincit/logspout-gelf" time stamp shows epoch + uptime:
1970-01-01 01:33:38 +0100 stuff: {"version":"1.1","host":"server1","short_message":"2018-02-09T16:07:25.546Z [access-log] ::ffff:1.2.3.4 - \"GET /find HTTP/1.1\" 200 5567 \"-\" \"ELB-HealthChecker/2.0\"1234","level":3,"image_id":"sha256:12345","image_name":"hello-world","container_id":"12345","container_name":"hello_world-task","command":"node bin/hello_world.js"}