Wildcards and gravity list

In the end of the pihole -g procedure remove all domains in the gravity.list which also are captured bij the wildcard list

An example: Wildcard is .doubleclick.net
In the gravity.list a domain like rd.intl.doubleclick.net can be removed. It's double.

This reduces the size of the gravity.list, makes the PiHole a little bit faster and reduce some memory.

We can look into how much it would affect the size and speed of the black list, but I have a feeling that it would not greatly affect it to any noticable degree.

Outdated as with v5.0's Group Management wildcard and blocklists are not global anymore. One may want a client only for wildcard block an another for specific domain.