Updated addSSLSANOrder (markdown)

addSSLSANOrder.md

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-f
+URL: /orders/add_ssl_san_order/<br/>
+Request type: POST
+
+### Overview
+Use that method to purchase more SAN items to your Multi-Domain SSL Certificate. Use :link:[reissueSSLOrder](https://github.com/gogetssl/api/wiki/reissueSSLOrder) method to reissue SSL with new SAN items.
+
+### Request parameters
+* order_id - ORDER ID to which your add extra SAN
+* count - Quantity of SAN names to add
+
+### Response
+If no errors in request following parameters will be returned:
+* order_id - unique order ID
+* invoice_id