not used at all, the default socket is
\fB@RUNDIR@/\*(PN.\fIpid\fB.ctl\fR, where \fIpid\fR is \fB\*(PN\fR's
process ID.
+.IP
+On Windows, uses a kernel chosen TCP port on the localhost to listen
+for runtime management commands. The kernel chosen TCP port value is written
+in a file whose absolute path is pointed by \fIsocket\fR. If \fB\-\-unixctl\fR
+is not used at all, the file is created as \fB\*(PN.ctl\fR in the configured
+\fIOVS_RUNDIR\fR directory.
+.IP
Specifying \fBnone\fR for \fIsocket\fR disables the control socket
feature.