InotifyTool: recommend to use pyinotify instead of inotifyx

inotifyx is has no support for Python 3 and
it does not seem to be maintained anymore.

product/ERP5/Tool/InotifyTool.py

@@ -37,7 +37,7 @@ from AccessControl.SecurityManagement import newSecurityManager, \
   getSecurityManager, setSecurityManager
 
 # TODO: Current API was designed to avoid compability issues in case it is
-#       reimplemented using http://pypi.python.org/pypi/inotifyx
+#       reimplemented using https://pypi.python.org/pypi/pyinotify
 
 IN_CREATE = 1
 IN_MODIFY = 2