DNS NOTIFY RFC 1996 support

### Prerequisites

- [X] I have checked the [Wiki](https://github.com/AdguardTeam/AdGuardHome/wiki) and [Discussions](https://github.com/AdguardTeam/AdGuardHome/discussions) and found no answer

- [X] I have searched other issues and found no duplicates

- [X] I want to request a feature or enhancement and not ask a question

### The problem

This memo describes the NOTIFY opcode for DNS, by which a master server advises a set of slave servers that the master's data has been changed and that a query should be initiated to discover the new data.

### Proposed solution

Proposed solution:
https://www.rfc-editor.org/rfc/rfc1996.html

### Alternatives considered and additional information

Possible related with:
https://github.com/AdguardTeam/AdGuardHome/issues/790