De-spl parts of the routing socket code now generally protected through locking; leave some spl references around code where there are open questions about global variable references.  Also, add an XXX regarding locking in sysctl.
De-spl parts of the routing socket code now generally protected
through locking; leave some spl references around code where there
are open questions about global variable references.  Also, add
an XXX regarding locking in sysctl.

MFC after:	3 days

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase