Suggestion: allow to put FQDNs into DNS field

[this-username-has-been-taken]

Hello!

I have a suggestion: allow to put FQDNs into the DNS field. According to the Wireguard manual (see https://www.man7.org/linux/man-pages/man8/wg-quick.8.html DNS — a comma-separated list of IP (v4 or v6) addresses to be set as the interface's DNS servers, or non-IP hostnames to be set as the interface's DNS search domains.) it is possible to put host addresses into the DNS field. In such case they will be treated as DNS suffixes in the connection.

Thank you!