Implement filtering in macfilter plugin

[damyan]

I want to be able to filter on existing list of MACs. Configuration proposal:

allowList: 
  - AA:BB:CC
  - FF:EE:00
denyList:
  - EE:00
  - AA:BB

The plugin is supposed to be configured first in the plugin chain. Either an allow, or a deny list (or both) should be specified.
A client MAC address shall be validated against both lists according to the following rules:

Allow List MAC Status	Deny List MAC Status	Client Action
match	no match	allow
match	match	deny
match	not defined	allow
no match	no match	deny
no match	match	deny
no match	not defined	deny
not defined	no match	allow
not defined	match	deny
not defined	not defined	not allowed, configuration error on startup