Upon virtual network stack teardown properly release the TCP syncache resources.
Upon virtual network stack teardown properly release the TCP syncache
resources.

Sponsored by:	ISPsystem
Reviewed by:	rwatson
MFC After:	5 days

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