Documentation update.

README.md

@@ -351,6 +351,7 @@ You don't have to do anything manually!
 1. PointDNS API (https://pointhq.com/)
 1. Active24.cz API (https://www.active24.cz/)
 1. do.de API (https://www.do.de/)
+1. NederHost API (https://www.nederhost.nl/)
 
 And:
 

dnsapi/README.md

@@ -1172,6 +1172,20 @@ acme.sh --issue --dns dns_doapi -d example.com -d *.example.com
 
 The API token will be saved in `~/.acme.sh/account.conf` and will be reused when needed.
 
+## 61. Use NederHost API
+
+Create an API token in Mijn NederHost.
+
+Set your API key:
+```
+export NederHost_Key='xxx'
+```
+
+To issue a certificate run:
+```
+acme.sh --issue --dns dns_nederhost -d example.com -d *.example.com
+```
+
 # Use custom API
 
 If your API is not supported yet, you can write your own DNS API.