Merge 19ffc8f8f9 into b3f915b5b2

README.md

@@ -229,8 +229,12 @@ Add the following txt record:
 Domain:_acme-challenge.www.example.com
 Txt value:9ihDbjxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
 
+```
+
 Please add those txt records to the domains. Waiting for the dns to take effect.
 ```
+If you did not wait until DNS knows your values the renew will fail, be patient!
+```
 
 Then just rerun with `renew` argument: