This makes some other changes:
* Moves packer related files to packer directory.
* Updates build scripts for new packer directory.
* Renames boxes to metasploitabl3-<OS>
This flag is hidden within a binary that runs a webservice on a given port.
The port is blocked until the correct port knocking sequence is initiated.
The default port sequence is all of the user's salary numbers.
The commit also moves a lot of values that were previously in recipes into
attributes files for easier maintaining going forward.
