updated docs for dns_kinghost api usage

README.md

@@ -313,6 +313,7 @@ You don't have to do anything manually!
 1. zonomi.com DNS API
 1. DreamHost.com API
 1. DirectAdmin API
+1. KingHost (https://www.kinghost.com.br/)
 
 
 And: 

dnsapi/README.md

@@ -784,6 +784,17 @@ acme.sh --issue --dns dns_da -d example.com -d www.example.com
 
 The `DA_Api` and `DA_Api_Insecure` will be saved in `~/.acme.sh/account.conf` and will be reused when needed.
 
+## 42. Use KingHost DNS API
+
+API access must be enabled at https://painel.kinghost.com.br/painel.api.php
+
+```
+export KINGHOST_username="yourusername"
+export KINGHOST_Password="yourpassword"
+acme.sh --issue --dns dns_kinghost -d example.com -d *.example.com
+```
+
+The `KINGHOST_username` and `KINGHOST_Password` will be saved in `~/.acme.sh/account.conf` and will be reused when needed.
 
 # Use custom API