close #306 .

We badly called this function `start_server` when it should have been
`when_ready` .

examples/example_config.py

@@ -198,5 +198,5 @@ def pre_fork(server, worker):
 def pre_exec(server):
     server.log.info("Forked child, re-executing.")
 
-
-
+def when_ready(server):
+    server.log.info("Server is ready. Spwawning workers")

gunicorn/config.py

@@ -858,9 +858,9 @@ class WhenReady(Setting):
     section = "Server Hooks"
     validator = validate_callable(1)
     type = "callable"
-    def start_server(server):
+    def when_ready(server):
         pass
-    default = staticmethod(start_server)
+    default = staticmethod(when_ready)
     desc = """\
         Called just after the server is started.