zephyr_mirror: Add option to control path to streams file.

This makes it easy to test the class mirror on just a single test
stream.

(imported from commit 3decb1ced54507683f1c0634df14f73e693104ef)

bots/zephyr_mirror_backend.py

@@ -213,7 +213,7 @@ def zephyr_bulk_subscribe(subs):
 
 def update_subscriptions():
     try:
-        f = file("/home/humbug/public_streams", "r")
+        f = file(options.stream_file_path, "r")
         public_streams = simplejson.loads(f.read())
         f.close()
     except:
@@ -801,6 +801,10 @@ def parse_args():
     parser.add_option('--enable-log',
                       dest='log_path',
                       help=optparse.SUPPRESS_HELP)
+    parser.add_option('--stream-file-path',
+                      dest='stream_file_path',
+                      default="/home/humbug/public_streams",
+                      help=optparse.SUPPRESS_HELP)
     parser.add_option('--no-forward-personals',
                       dest='forward_personals',
                       help=optparse.SUPPRESS_HELP,