Add new feature

[charcoalRN]

Hello!

Could you add the --mask parameter?

The parameter value should be a hexadecimal mask, for example, --mask FFFFAB{}FAC8 (or --mask FFFFAB*FAC8) , where {} is replaced with values from the -r parameter.

Example:
--mask FFFFAB{}FAC8
For --range 0:F, the following will be generated:

FFFFAB0FAC8
FFFFAB1FAC8
FFFFAB2FAC8
FFFFAB3FAC8
...
FFFFABFFAC8

Thank you!