Introduce a global mtx 'ngsocketlist_mtx' to protect the global ng_socket list during insert/delete.
Introduce a global mtx 'ngsocketlist_mtx' to protect the global
ng_socket list during insert/delete.

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