PowerShell revisions

[God-damnit-all]

-? (tied to the help output) was previously there, presumably to prevent a crash, but all that line really needed was to start with a space just like the cmd option.

-ExecutionPolicy Unrestricted was added so that script calls in Microsoft.PowerShell_profile.ps1 don't cause errors when opening. (Not sure why it happens when my system is already set to that, I'm guessing it's probably related to the way the app sandboxes things.)

pwsh was added as an option, which is tied to versions of PowerShell beyond 5.1.