fix cfg file lookup

router.py

@@ -1,5 +1,6 @@
 import sys
 import socket
+from glob import glob
 from select import select
 from serial import serial_for_url
 from subprocess import Popen, PIPE, check_output, call
@@ -193,5 +194,8 @@ class AcceptHandler:
 
 if __name__ == '__main__':
     parser = ConfigParser()
-    parser.read('/root/aputools/servercfg/%s.cfg' % socket.gethostname())
+    cfgfiles = glob('/root/aputools/servercfg/%s_*.cfg' % socket.gethostname())
+    if len(cfgfiles) != 1:
+        raise ValueError('there must be one and only one single cfgfile %r' % cfgfiles)
+    parser.read(cfgfiles[0])
     AcceptHandler.run(parser['ROUTER'])