Change module boilerplate

This PR also updates msftidy to check for the old boiler plate, and a tool for updating the boiler plate for the inevitable copy-pasted modules.

See: https://dev.metasploit.com/redmine/issues/8496

Note, once https://dev.metasploit.com/redmine/issues/8497 is resolved, it'll be possible for msftidy to not only warn and error, but fix problems that can be solved programmatically like this.

## Verification

- [ ] Run msftidy.rb against modules.
- [ ] Note the lack of warnings for "Module contains old license comment"
- [ ] Find an older Metasploit module; just checkout something from last week's release.
- [ ] Run msftidy.rb on it, note the warning.
- [ ] Read all 2000 or so modules to ensure that no extraneous comments got axed by the regex. (This is the fun part)