* master: (75 commits)
ipv6 metrics swapped; fixes #2000
haproxy_plugin: get data via UrlService bugfix
more info about -W set
allow all configuration options to be set from the command line; #1991
allow .scope sub-cgroups
enable libvirt cgroups
mongodb_plugin: take "arbiter" replica set member into account
Create draft release when uploading from Travis
Update checks to work on OS X
Post release 1.6.0
Prepare release 1.6.0
Fix misc compiler warnings on FreeBSD
Fix compiler warnings for FreeBSD plugin
coverity: 164803 Resource leak in ARL (impossible case)
freebsd coverity: 164808 Uninitialized scalar variable
freebsd coverity: 164810 Uninitialized scalar variable
freebsd coverity: 164802 Same on both sides
fixed typo in sizeof()
properly initialize new memory regions after reallocz(); fixes #1972
run-parts does not run scripts with .sh extension
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