Add option to strip (ignore) AAAA records of chosen domains

[yubiuser]

That will be possible when the improved regex engine is merged into pihole master (currently in development branch). It will allow you to block certain query types. I use it to block all AAAA records, but it can be used for certain domains only.

RegEx engine improvements

New feature: Apply regex only to a specific query type. Example: abc;querytype=AAAA will block dig AAAA abc but not dig A abc This is still experimental. Tests would be appreciated.

Option to block/not forward all AAAA queries

I have a IPv4 only network and would like to block all AAAA queries (~20% of total queries). They will not be of use for any client but increase network traffic anyway.