doc: update contrib/seeds/README dnspython installation info

jonatack · jonatack · commit 961f148cb1b4 · 2020-11-02T20:54:59.000+01:00
diff --git a/contrib/seeds/README.md b/contrib/seeds/README.md
@@ -16,6 +16,12 @@ The seeds compiled into the release are created from sipa's DNS seed data, like
 
 ## Dependencies
 
-Ubuntu:
+Ubuntu, Debian:
 
     sudo apt-get install python3-dnspython
+
+and/or for other operating systems:
+
+    pip install dnspython
+
+See https://dnspython.readthedocs.io/en/latest/installation.html for more information.
