[PATCH:xdm] Add man page for xdmshell

[Fernando Carrijo]

Alan Coopersmith <alan.coopersmith at oracle.com> wrote:
> Fixes:
>  X.Org bug #7342 - http://bugs.freedesktop.org/show_bug.cgi?id=7342
>  X Consortium bug #4559 (reported 30 Sep 1991)
> 
> Text based on the X11R4 release notes description of xdmshell from:
> 	http://ftp.x.org/pub/X11R4/RELNOTES.txt
> 
> Signed-off-by: Alan Coopersmith <alan.coopersmith at oracle.com>

Reviewed-by: Fernando Carrijo <fcarrijo at yahoo.com.br>