Genie:  Expect fixed IPv4 sockaddr length
vfs:  Add filehandle method set member
Genie:  Pass filehandle methods to StreamHandle
Genie:  Pass filehandle_method_set to SocketHandle
vfs:  Add socket_methods() member to filehandle
vfs:  Add socket_method_set
Genie:  Define pairedsocket_methods
Genie:  Define OT_methods
vfs:  Add socket primitives
Genie:  Use vfs primitives for socket syscalls
Genie:  Clean up includes in socket.cc
Genie:  Remove virtual SocketHandle members
Genie:  Don't store redundant OT sockaddr length
Genie:  Derive OTSocket from StreamHandle
Genie:  Derive PairedSocket from StreamHandle
Genie:  Remove obsolete SocketStream unit
Merge branch 'socket-methods'