Log messages when restarting logs.

(Recreating this diff after outdating the wrong revision.) :-(

src/ZEO/start.py

@@ -313,7 +313,7 @@ def rotate_logs():
     init = getattr(zLOG, 'initialize', None)
     if init is not None:
         init()
-        return
+    else:
         # This will work if the minimal logger is in use, but not if some
         # other logger is active.  MinimalLogger exists only in Zopes
         # pre-2.7.
@@ -321,7 +321,10 @@ def rotate_logs():
             import zLOG.MinimalLogger
             zLOG.MinimalLogger._log.initialize()
         except ImportError:
-        pass
+            zLOG.LOG("ZEO/start.py", zLOG.WARNING,
+                     "Caught USR2, could not rotate logs")
+            return
+    zLOG.LOG("ZEO/start.py", zLOG.INFO, "Caught USR2, logs rotated")
 
 def rotate_logs_handler(signum, frame):
     rotate_logs()