Both are used, but "multiplexer" seems to be majority usage in
English.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
.B AF_KCM
T}:T{
.\" commit: 03c8efc1ffeb6b82a22c1af8dd908af349563314
-KCM (kernel connection multiplexor) interface
+KCM (kernel connection multiplexer) interface
T}
T{
.B AF_XDP
.TP
.B AF_KCM
.\" commit: 03c8efc1ffeb6b82a22c1af8dd908af349563314
-KCM (kernel connection multiplexor) interface (since Linux 4.6).
+KCM (kernel connection multiplexer) interface (since Linux 4.6).
See
.I Documentation/networking/kcm.txt
in the Linux kernel source tree for details.