* Add diskstats collector for OpenBSD
Tested on i386 and amd64, OpenBSD 6.4 and -current.
* Refactor diskstats collectors
This moves common descriptors from Linux, Darwin, OpenBSD
diskstats collectors into diskstats_common.go
Signed-off-by: Ralf Horstmann <ralf+github@ackstorm.de>
* Move NodeCollector into package collector
* Refactor collector enabling
* Update README with new collector enabled flags
* Fix out-of-date inline flag reference syntax
* Use new flags in end-to-end tests
* Add flag to disable all default collectors
* Track if a flag has been set explicitly
* Add --collectors.disable-defaults to README
* Revert disable-defaults flag
* Shorten flags
* Fixup timex collector registration
* Fix end-to-end tests
* Change procfs and sysfs path flags
* Fix review comments
* Add diskstats collector for Darwin
* Update year in the header
* Update README.md
* Add github.com/lufia/iostat to vendored packages
* Change stats to follow naming guidelines
* Add a entry of github.com/lufia/iostat into vendor.json
* Remove /proc/diskstats from description
Tom Wilkie