Created Notify_prowl (markdown)

Notify_prowl.md

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+## Prowl Notifications
+* **Source**: https://www.prowlapp.com/
+* **Icon Support**: No
+* **Message Format**: Text
+* **Message Limit**: 10000 Characters per message
+
+Prowl requires users to pre-register themselves at [prowlapp.com](https://www.prowlapp.com/) first.
+
+### Syntax
+Valid syntaxes are as follows:
+* **prowl**:://**{apikey}**
+* **prowl**:://**{apikey}**/**{providerkey}**
+
+### Parameter Breakdown
+| Variable    | Required | Description
+| ----------- | -------- | -----------
+| apikey    | Yes      | The API Key provided to you after you create yourself a Prowl account.
+| providerkey        | No       | The Provider Key is only required if you have been whitelisted.
+
+#### Example
+Send a Prowl notification to our server
+```bash
+# Assuming our {apikey} is adf9dfjkj24jkafkljkf6f
+notify prowl://adf9dfjkj24jkafkljkf6f
+```