[FLINK-12075] Update flink-conf.yaml to not specify rest.port per def…

…ault

This commits updates the flink-conf.yaml to contain the new rest options and comments
out the rest.port per default.

flink-dist/src/main/resources/flink-conf.yaml

@@ -121,17 +121,25 @@ parallelism.default: 1
 # state.backend.incremental: false
 
 #==============================================================================
-# Web Frontend
+# Rest & web frontend
 #==============================================================================
 
-# The address under which the web-based runtime monitor listens.
+# The port to which the REST client connects to. If rest.bind-port has
+# not been specified, then the server will bind to this port as well.
 #
-#web.address: 0.0.0.0
+#rest.port: 8081
 
-# The port under which the web-based runtime monitor listens.
-# A value of -1 deactivates the web server.
+# The address to which the REST client will connect to
+#
+#rest.address: 0.0.0.0
+
+# Port range for the REST and web server to bind to.
+#
+#rest.bind-port: 8080-8090
 
-rest.port: 8081
+# The address that the REST & web server binds to
+#
+#rest.bind-address: 0.0.0.0
 
 # Flag to specify whether job submission is enabled from the web-based
 # runtime monitor. Uncomment to disable.