runtornado: Remove ability to run without specifying exactly one port

The zero-port case never actually worked, because addrport wasn't an optional
parameter in run_one.  And multiple ports was implemented using the
multiprocessing library, which is just bad news.  Since we have no need for
this, remove it before it can cause trouble.

(imported from commit 9d913924701f30d23ebe878b76c8f1f0da2800e2)

zephyr/management/commands/runtornado.py

@@ -21,43 +21,20 @@ class Command(BaseCommand):
     help = "Starts a Tornado Web server wrapping Django."
     args = '[optional port number or ipaddr:port]\n  (use multiple ports to start multiple servers)'
 
-    def handle(self, *addrport, **options):
+    def handle(self, addrport, **options):
         # setup unbuffered I/O
         sys.stdout = os.fdopen(sys.stdout.fileno(), 'w', 0)
         sys.stderr = os.fdopen(sys.stderr.fileno(), 'w', 0)
 
-        if len(addrport) == 0:
-            self.run_one(**options)
-        elif len(addrport) == 1:
-            self.run_one(addrport[0], **options)
-        else:
-            from multiprocessing import Process
-
-            plist = []
-            for ap in addrport:
-                p = Process(target=self.run_one, args=(ap,), kwargs=options)
-                p.start()
-                plist.append(p)
-
-            while plist:
-                if plist[0].exitcode is None:
-                    plist.pop(0)
-                else:
-                    plist[0].join()
-
-    def run_one(self, addrport, **options):
         import django
         from django.core.handlers.wsgi import WSGIHandler
         from tornado import httpserver, wsgi, ioloop, web
 
-        if not addrport:
-            addr = ''
-            port = '8000'
-        else:
-            try:
-                addr, port = addrport.split(':')
-            except ValueError:
-                addr, port = '', addrport
+        try:
+            addr, port = addrport.split(':')
+        except ValueError:
+            addr, port = '', addrport
+
         if not addr:
             addr = '127.0.0.1'