Provide MAC address as option for Per-client blocking

[yubiuser]

Feedback for "Allow defining clients by their MAC address, host name and networking interface"

Started this topic to provide feedback to the new feature allowing clients to be defined by MAC address. I switched to the branches (core still master) by pihole checkout ftl new/mac_clients pihole checkout web new/mac_clients And flushed network table afterwards. Important First thing I noticed in Group management/Clients Known Clients now only contain clients with known MAC, no IPs are listed anymore (I have devices on other Vlans so IP would still be handy). [Bildschirmfoto zu 2020-0…