Changed struct socket to include a new field (at the end, so as not to break existing software) acting as a pointer to emulator-specific state data that some emulators may (or may not) need to maintain about a socket.
Changed struct socket to include a new field (at the end, so as not
to break existing software) acting as a pointer to emulator-specific
state data that some emulators may (or may not) need to maintain about
a socket.

Used by the svr4 module as a place for maintaining STREAMS emulation state.

Discussed with: Mike Smith, Garrett Wollman back in Sept 98

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