Update ICPC Contest API urls

Author: thijskh

README.md

@@ -9,4 +9,4 @@ The following subdirectories contain:
 * `website` the HTML code for www.domjudge.org
 * `icpc-wf` scripts used at the ICPC World Finals
 * `contest-api` a script to validate an implementation of the
-  [ICPC contest API](https://clics.ecs.baylor.edu/index.php/Contest_API)
+  [ICPC contest API](https://ccs-specs.icpc.io/contest_api)

contest-api/check-api.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 # Checks whether a Contest API conforms to the specification
-# https://clics.ecs.baylor.edu/index.php/Contest_API
+# https://ccs-specs.icpc.io/contest_api
 
 # Set path to json-validate binary if it's not in PATH:
 #VALIDATE_JSON=/path/to/validate-json
@@ -71,7 +71,7 @@ $(basename $0) - Validate a Contest API implementation with JSON schema.
 Usage: $(basename $0) [option]... URL
 
 This program validates a Contest API implementation against the
-specification: https://clics.ecs.baylor.edu/index.php/Contest_API
+specification: https://ccs-specs.icpc.io/contest_api
 
 The URL must point to the base of the API, for example:
 

website/documentation.shtml

@@ -18,7 +18,7 @@ state as well as perform certain actions, such as submit solutions
 and control contest state (with admin role).</p>
 
 <p>The DOMjudge API is an implementation of the ICPC
-<a href="https://clics.ecs.baylor.edu/index.php/Contest_API">Contest API</a>
+<a href="https://ccs-specs.icpc.io/contest_api">Contest API</a>
 (except that it does not (yet) implement the optional <code>team-members</code>
 endpoint). It also has some extensions, see the
 <a href="demoweb/api/doc">internal API documentation</a>.</p>