* Improve OpenBSD -CURRENT detection and Dry-run feedback
This commit improves the -CURRENT detection by way of parsing `/etc/motd`. This change is more future-proof as when OpenBSD nears a stable release, `uname` will temporarily report like -STABLE.
This commit *also* adds feedback if -CURRENT is found to make debugging this feature easier with `--dry-run`, or, just a regular run as well.
* Make OpenBSD step less talky and improve verbiage.
This commit removes the command flag feedback. This commit also swaps the output "update", for "upgrade", making this step closer to other steps for consistency.
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