Log a statsd event when restarting the server

(imported from commit e9fa632a39f0a6b6aa7311e80e68faf4178a2cf3)

tools/restart-server

@@ -5,6 +5,7 @@ import subprocess
 import pylibmc
 import traceback
 import logging
+import time
 
 logging.basicConfig(format="%(asctime)s restart-server: %(message)s",
                     level=logging.INFO)
@@ -18,6 +19,9 @@ ENDC = '\033[0m'
 
 os.chdir("/home/humbug/humbug-deployments/current")
 
+# Send a statsd event on restarting the server
+subprocess.check_call(["python", "./manage.py", "send_stats", "gauge", "events.server_restart", str(int(time.time()))])
+
 # Restart the FastCGI process, which is running in a shell loop in screen.
 # TODO: real daemonization
 logging.info("Killing daemons")