[new-git-repository] Remove IP address check for git.mysociety.org

We can't rely on the IP address for git.mysociety.org being bound to a
local interface on the server hosting it any longer.

For now this replaces the check with one that checks for the presence of
`/data/git`, which isn't perfect but is better than nothing.

Fixes #69

bin/new-git-repository

@@ -5,18 +5,13 @@ import argparse
 import json
 import os
 import requests
-import socket
 from subprocess import check_call
 import sys
 
 def is_correct_server():
-    git_ip = socket.gethostbyname('git.mysociety.org')
-
-    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
-    s.connect(('46.43.39.78', 0))  # connecting to a UDP address doesn't send packets
-    local_ip = s.getsockname()[0]
-
-    if git_ip != local_ip:
+    if os.path.exists('/data/git'):
+        return
+    else:
         sys.exit("You can only run this on git.mysociety.org")
 
 def parse_arguments():