Merge pull request oliver006#504 from mcsps/master

Run Docker image as non-root

Merge pull request oliver006#505 from oliver006/oh_misc_stuff

fix parseMetricsCommandStats() and log "LATENCY LATEST" error only once

Merge pull request oliver006#501 from oliver006/oh_lint

Fix lint issue, add expired_stale_percentage metric, update redigo&logrus

Revert "Bump github.com/gomodule/redigo from 1.8.3 to 1.8.4 (oliver00…

…6#489)" (oliver006#491)

This reverts commit 6ff605c.

Default to 0 when reporting missing key sizes (oliver006#483)

Prometheus recommends avoiding missing metrics by exporting 0 when
missing metrics are known in advance (which is the case for
check-single-keys and any keys found while scanning with check-keys).

breaking up exporter.go and exporter_test.go into smaller units (oliv…

…er006#474)

* breaking up exporter.go and exporter_test.go into smaller, more manageable units

* simplify key-value handling

Add scrape password file support (oliver006#465)

* Add scrape password file support

password file format:

{
"redis://<<HOSTNAME>>:<<PORT>>":"<<PASSWORD>>"
}

defer after we check err!=nil

clarify auth part in README

Fix drone docker releases (oliver006#449)

Post merging of oliver006#435, drone docker releases are broken.
This commit fixes it.