Enhancement - multiple domains in DNS Server

[me21]

Please add the ability to serve DNS requests for multiple domains in DNS Server. For example, newer versions of Android check the availability of Internet by accessing URL http://clients3.google.com/generate_204 and expecting to get HTTP 204 code.

At the same time, returning ESP8266 IP address for all DNS queries by using "*" domain name in DNS server setup is not optimal, because all applications that are installed on Android will try to access their servers by ESP8266 IP.