Update rigctlcom.1 man page to add new -B --mapa2b option

doc/man1/rigctlcom.1

@@ -28,6 +28,7 @@ rigctlcom \- COM port passthru as TS-2000 emulator to your rig
 .OP \-S baud
 .OP \-c id
 .OP \-C parm=val
+.OP \-B
 .RB [ \-v [ \-Z ]]
 .YS
 .
@@ -244,7 +245,6 @@ e.g. \(lqrigctl -l | more\(rq.
 .
 .TP
 .BR \-n ", " \-\-no\-restore\-ai
-On exit
 .B rigctl
 restores the state of auto information (AI) on the controlled rig.
 .IP
@@ -253,6 +253,12 @@ If this is not desired, for example if you are using
 to turn AI mode on or off, pass this option.
 .
 .TP
+.BR \-B ", " \-\-mapa2b
+Maps set_freq on VFOA to VFOB instead.
+This allows using CW skimmer with the rig in split mode and clicking on a frequency in CW skimmer
+will set VFOB to the transmit frequency.
+.
+.TP
 .BR \-v ", " \-\-verbose
 Set verbose mode, cumulative (see
 .B DIAGNOSTICS