Made tweaks suggested at benoitc/gunicorn/benoitc#1131

Author: kirubakaran

gunicorn/sock.py

@@ -40,8 +40,8 @@ def set_options(self, sock, bound=False):
         sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
         try:
             sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1)
-        except socket.error as ex:
-            if ex.errno == 92:
+        except socket.error as e:
+            if e.errno == errno.ENOPROTOOPT:
                 self.log.warning('SO_REUSEPORT socket option not supported.')
         if not bound:
             self.bind(sock)