Pull request: dhcpd: fix ip option parsing

Merge in DNS/adguard-home from 2688-dhcp-opt-ip to master

Updates #2688.

Squashed commit of the following:

commit e17e003a3a61c1f4ed55617bb61df721cbca12c1
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Tue Feb 16 17:10:32 2021 +0300

    dhcpd: fix ip option parsing

CHANGELOG.md

@@ -17,6 +17,14 @@ and this project adheres to
 ## [v0.105.2] - 2021-02-24
 -->
 
+### Fixed
+
+- Wrong parsing of DHCP options of the `ip` type ([#2688]).
+
+[#2688]: https://github.com/AdguardTeam/AdGuardHome/issues/2688
+
+
+
 ## [v0.105.1] - 2021-02-15
 
 ### Changed