tcpsvd(8) on Linux
The text 47b2bc8f9724, as Debian 3.1 (Sarge) shipped it.
TCP/IP service daemon
Flags it lists
-
-C -
-E -
-b -
-c -
-h -
-i -
-l -
-p -
-t -
-u -
-v -
-vv -
-x