nxagent: fix references to default rules in manpage

nx-X11/programs/Xserver/hw/nxagent/man/nxagent.1

@@ -620,12 +620,12 @@ settings.
 .I <model>/<layout>
 use the given model and layout. You can not modify keyboard rules,
 variant or options. Instead preset values are used. These are
-\fIxfree86\fR for rules and empty strings for variant and options.
+\fIbase\fR for rules and empty strings for variant and options.
 .RE
 .TP 8
 
 .PP
-If \fIkeyboard\fR is omitted the internal defaults of \fBnxagent\fR will be used (rules: \fIxfree86\fR, layout: \fIus\fR, model: \fIpc102\fR, empty variant and options).
+If \fIkeyboard\fR is omitted the internal defaults of \fBnxagent\fR will be used (rules: \fIbase\fR, layout: \fIus\fR, model: \fIpc102\fR, empty variant and options).
 
 .TP 8
 .B keyconv=<string>