Handle proxy string split better

Author: fredthomsen

hyper/http11/connection.py

@@ -78,10 +78,11 @@ def __init__(self, host, port=None, secure=None, ssl_context=None,
         self._sock = None
 
         if proxy:
-            self.proxy_host, self.proxy_port = proxy.split(':')
-            if(self.proxy_port):
+            if(':' in proxy):
+                self.proxy_host, self.proxy_port = proxy.split(':')
                 self.proxy_port = int(self.proxy_port)
             else:
+                self.proxy_host = proxy
                 self.proxy_port = 8080
         else:
             self.proxy_host = None