diff --git a/jupyterhub/apihandlers/users.py b/jupyterhub/apihandlers/users.py
index fb16f944..75bc4973 100644
--- a/jupyterhub/apihandlers/users.py
+++ b/jupyterhub/apihandlers/users.py
@@ -220,11 +220,11 @@ class UserCreateNamedServerAPIHandler(APIHandler):
         user = self.find_user(name)
         if user is None:
             raise HTTPError(404, "No such user %r" % name)
-        if user.running:
-            # include notify, so that a server that died is noticed immediately
-            state = yield user.spawner.poll_and_notify()
-            if state is None:
-                raise web.HTTPError(400, "%s's server is already running" % name)
+        #if user.running:
+        #    # include notify, so that a server that died is noticed immediately
+        #    state = yield user.spawner.poll_and_notify()
+        #    if state is None:
+        #        raise web.HTTPError(400, "%s's server is already running" % name)
 
         options = self.get_json_body()
         yield self.spawn_single_user(user, options=options)
@@ -246,8 +246,8 @@ class UserDeleteNamedServerAPIHandler(APIHandler):
         if user.stop_pending:
             self.set_status(202)
             return
-        if not user.running:
-            raise web.HTTPError(400, "%s's server is not running" % name)
+        #if not user.running:
+        #    raise web.HTTPError(400, "%s's server is not running" % name)
         # include notify, so that a server that died is noticed immediately
         status = yield user.spawner.poll_and_notify()
         if status is not None:
diff --git a/jupyterhub/app.py b/jupyterhub/app.py
index 23ee42e6..ccc6acb1 100644
--- a/jupyterhub/app.py
+++ b/jupyterhub/app.py
@@ -503,8 +503,8 @@ class JupyterHub(Application):
     def _authenticator_default(self):
         return self.authenticator_class(parent=self, db=self.db)
     
-    allow_multiple_servers = Bool(False,
-        help="Allow multiple single-server per user"
+    allow_named_servers = Bool(False,
+        help="Allow named single-user servers per user"
     ).tag(config=True)
     
     # class for spawning single-user servers
@@ -1343,7 +1343,7 @@ class JupyterHub(Application):
             subdomain_host=self.subdomain_host,
             domain=self.domain,
             statsd=self.statsd,
-            allow_multiple_servers=self.allow_multiple_servers,
+            allow_named_servers=self.allow_named_servers,
             oauth_provider=self.oauth_provider,
         )
         # allow configured settings to have priority
diff --git a/jupyterhub/spawner.py b/jupyterhub/spawner.py
index ce184de6..38ff003f 100644
--- a/jupyterhub/spawner.py
+++ b/jupyterhub/spawner.py
@@ -470,7 +470,7 @@ class Spawner(LoggingConfigurable):
         """
         d = {'username': self.user.name}
         if self.user.server:
-            d['base_url'] = self.user.server.base_url
+            d['base_url'] = self.server_base_url
         return d
 
     def format_string(self, s):
@@ -495,7 +495,7 @@ class Spawner(LoggingConfigurable):
         """
         args = [
             '--user="%s"' % self.user.name,
-            '--base-url="%s"' % self.user.server.base_url,
+            '--base-url="%s"' % self.server_base_url,
             '--hub-host="%s"' % self.hub.host,
             '--hub-prefix="%s"' % self.hub.server.base_url,
             '--hub-api-url="%s"' % self.hub.api_url,
diff --git a/jupyterhub/user.py b/jupyterhub/user.py
index c0727d31..2e91c466 100644
--- a/jupyterhub/user.py
+++ b/jupyterhub/user.py
@@ -236,7 +236,8 @@ class User(HasTraits):
         db.commit()
 
         spawner = self.spawner
-        # Passing server_name to the spawner
+        # Passing server_name and base_url to the spawner
+        spawner.server_base_url = base_url
         spawner.server_name = server_name
         spawner.user_options = options or {}
         # we are starting a new server, make sure it doesn't restore state