Update OpenBSD step to incorporate checking if on -CURRENT so we can pass the correct flags to sysupgrade(8) and pkg_add(1)

Which tool is this about?

Topgrade OpenBSD step

Which operating systems are supported by this tool?

OpenBSD-STABLE (& OpenBSD-CURRENT)

What should Topgrade do to figure out if the tool needs to be invoked?

Pull from uname -r to check if suffixed by -current

Which exact commands should Topgrade run?

If uname -r has -current suffix:

• pkg_add -Dsnap -u (for pkg)
• sysupgrade -sn (for system)

Does it have a --dry-run option? i.e., print what should be done and exit.

No.

Does it need the user to confirm the execution? And does it provide a --yes option to skip this step?

No.

More information

I'm self-assigning this. I'll send a PR once finished testing.