- Renaming _nodeLost to _handleConnectionLost and removing the node parameter
whose the computation was done before each call to it.
- Renaming _dropIt to handleNodeLost, currently called only from the base
service handler, so the abstract definition as moved into it. In this case, a
call ensure that the node is not None.


git-svn-id: https://svn.erp5.org/repos/neo/branches/prototype3@1090 71dcc9de-d417-0410-9af5-da40c76e7ee4