Include extra status code

The code 000 can be returned by curl e.g. if the provided uri is bad.

status-check.sh

@@ -7,7 +7,8 @@
 # recipients are sourced from a separate file in the cwd; it is expected to
 # have a single email address per line.
 #
-# If WATCHDOG_LOG is set, all output will be redirected there.
+# If WATCHDOG_LOG is set, all output will be redirected there. It is expected
+# to be a writable file.
 #
 # Dependencies
 # - curl:  Polling the servers
@@ -62,7 +63,7 @@ main()
         echo "${stat}"
 
         # All other HTTP responses should not technically be errors
-        if ((${stat} >= 400 && ${stat} <= 599)); then
+        if (((${stat} >= 400 && ${stat} <= 599) || ${stat} == 000)); then
             FLAGGED[${full_uri}]=${stat}
         fi
     done