manpage: add -class

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

@@ -216,6 +216,38 @@ connection in each new generation.  If the user selects full
 regeneration, even the top-level window and the connection to the real
 server will be regenerated for each server generation.
 .TP 8
+.B \-class \fIstring\fP
+This option specifies the default visual class of the nested server.
+It is similar to the
+.B \-cc
+option from the set of standard options except that it will accept a string
+rather than a number for the visual class specification.
+The
+.I string
+must be one of the following six values:
+.BR StaticGray ,
+.BR GrayScale ,
+.BR StaticColor ,
+.BR PseudoColor ,
+.BR TrueColor ,
+or
+.BR DirectColor .
+If both the
+.B \-class
+and
+.B \-cc
+options are specified, the last instance of either option takes precedence.
+The class of the default visual of the nested server need not be the same as the
+class of the default visual of the real server, but it must be supported by the
+real server.
+Use
+.BR xdpyinfo (__appmansuffix__)
+to obtain a list of supported visual classes on the real server before
+starting \fBnxagent\fR.  If the user chooses a static class, all the
+colors in the default color map will be preallocated.  If the user
+chooses a dynamic class, colors in the default color map will be
+available to individual clients for allocation.
+.TP 8
 .B \-deferglyphs \fIwhichfonts\fP
 specifies the types of fonts for which the server should attempt to use
 deferred glyph loading.  \fIwhichfonts\fP can be all (all fonts),