Created Rename resolver (markdown)

Rename-resolver.md

@@ -0,0 +1,13 @@
+If there is the need to rename your existing resolver start a Bash session in your container
+
+`docker exec -it <containername> bash`
+
+and edit the _provider_name_ file - pay attention, it's a single-line file
+
+`vim /opt/dnscrypt-wrapper/etc/keys/provider_name`
+
+Now restart the container or even just the _dnscrypt-wrapper_ process.
+
+If your resolver is public don't forget to adapt (columns 'Name' and 'Provider name') the [CSV](https://github.com/jedisct1/dnscrypt-proxy/blob/master/dnscrypt-resolvers.csv) and submit a [pull request](https://github.com/jedisct1/dnscrypt-proxy/pulls).
+
+