Merge pull request #176 from clone1018/patch-1

Add WebSubHub.com to the list of spec'd hubs

implementation-reports/HUB-websubhub.md

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+# WebSubHub
+
+Implementation Home Page URL: https://websubhub.com
+
+Source code repo URL(s) (optional): https://github.com/clone1018/WebSubHub
+* [x] 100% open source implementation
+
+Programming Language(s): Elixir
+
+Developer(s): [clone1018](https://github.com/clone1018)
+
+Answers are:
+* [x] Confirmed via websub.rocks (for applicable results)
+* [x] All results are self-reported
+
+## Subscription
+
+* [x] 100: Supports subscriptions with `hub.mode`, `hub.topic` and `hub.callback`
+* [x] 101: Supports subscriptions with `hub.mode`, `hub.topic`, `hub.callback` and `hub.secret`
+* [x] 102: Ignores unrecognized parameters in the subscription request
+* [x] 103: Allows subscribers to re-request active subscriptions before they expire
+* [x] 104: Supports unsubscription requests
+* [x] 1xx: Sends a properly formatted verification request for subscribing and unsubscribing
+* [x] Allows subscribers to request a specific lease duration
+  * If not, then describe the default lease duration issued, or other specifics here
+
+(1xx denotes that you can can use any of the 100-104 tests to confirm this feature)
+
+## Distribution
+
+* [x] 100: Sends a notification with a matching content-type of the topic URL
+* [x] 100: Sends a notification with the full contents of the topic
+* [x] 101: Sends a notification with a valid signature
+  * Please select the signature method(s) that the hub uses to sign requests
+  * [ ] sha1
+  * [x] sha256
+  * [ ] sha384
+  * [ ] sha512
+* [ ] Sends only a diff of the topic URL for Atom or RSS feeds
+