[FLTMGR]

[FLTMGR]
- Implement FltCreateCommunicationPort, FltCloseCommunicationPort, FltCloseClientPort, and stub FltSendMessage
- Add two new object types for the server port and client ports
- Implement object type callbacks for closing and deleting these new ports
- Create the comms object and create the symbolic link (FltMgrMsg) to allow usermode to open a handle to the comms layer (aka FilterConnectCommunicationPort)
- Although untested, the comms layer objects should be mostly setup, and we should be able to open a connection from usermode.

svn path=/trunk/; revision=74589