Option to disallow passwords containing blacklisted passwords

The blacklist constraint disallows passwords that are the same as any of the passwords in the blacklist, neglecting case. Would like to add an option to also disallow any passwords that contain blacklisted passwords.

Example:
"password" is a bad password an administrator might want to disallow. However, "password123" is also a bad password that the administrator might want to disallow. By enabling an option to disallow any passwords containing the blacklisted password "password", he or she could disallow both bad passwords.