- add a "-d" option, to specify the display cwm should be started on

- adjust argc/argv by optind
- add an ENVIRONMENT section to the manpage

ok matthieu@ ray@

cwm.1

@@ -10,6 +10,7 @@
 .Sh SYNOPSIS
 .\" For a program:  program [-abc] file ...
 .Nm cwm
+.Op Fl d Ar display
 .Op Fl s 
 .Op Fl f Ar fontname
 .Sh DESCRIPTION
@@ -104,6 +105,8 @@ The options for
 .Nm
 are as follows:
 .Bl -tag -width Ds
+.It Fl d Ar display
+Specify the display to use.
 .It Fl s
 Set sticky group mode on.
 The default behavior for new windows is to not assign any group.
@@ -204,6 +207,14 @@ and
 .Xr xlock 1 ,
 respectively.
 
+.Sh ENVIRONMENT
+.TP
+DISPLAY
+.Nm
+starts on this display unless the
+.Fl d
+option is given.
+
 .Sh ACKNOWLEDGEMENTS
 .Nm
 contains some code from 9wm.