release 5.2.1

content/news/en/2020-12-09-knot-resolver-5.2.1.rst

+:title: Knot Resolver 5.2.1 released
+:slug: knot-resolver-5.2.1
+:date: 2020-12-09 11:00
+:lang: en
+
+Improvements
+------------
+- doh2: send Cache-Control header with TTL (#617, !1095)
+
+Bugfixes
+--------
+- fix map() command on 32-bit platforms; regressed in 5.2.0 (!1093)
+- doh2: restrict endpoints to doh and dns-query (#636, !1104)
+- renumber: map to correct subnet when using multiple rules (!1107)