Update xdg-utils to the latest version available in git.

third_party/xdg-utils/scripts/man/xdg-su.1

Index: third_party/xdg-utils/scripts/man/xdg-su.1
===================================================================
--- third_party/xdg-utils/scripts/man/xdg-su.1	(revision 79890)
+++ third_party/xdg-utils/scripts/man/xdg-su.1	(working copy)
@@ -1,75 +0,0 @@
-.\" ** You probably do not want to edit this file directly **
-.\" It was generated using the DocBook XSL Stylesheets (version 1.69.1).
-.\" Instead of manually editing it, you probably should edit the DocBook XML
-.\" source for it and then use the DocBook XSL Stylesheets to regenerate it.
-.TH "XDG\-SU" "1" "07/31/2006" "This is release 0.5 of the xdg\-su Manual" ""
-.\" disable hyphenation
-.nh
-.\" disable justification (adjust text to left margin only)
-.ad l
-.SH "NAME"
-xdg\-su \- run a GUI program as root after prompting for the root password
-.SH "SYNOPSIS"
-.HP 7
-\fBxdg\-su\fR [\fB\-u\ \fR\fB\fIuser\fR\fR] \fB\-c\ \fR\fB\fIcommand\fR\fR
-.HP 7
-\fBxdg\-su\fR {\fB\-\-help\fR \fB\-\-manual\fR \fB\-\-version\fR}
-.SH "DESCRIPTION"
-.PP
-xdg\-su provides a graphical dialog that prompts the user for a password to run
-\fIcommand\fR
-as
-\fIuser\fR
-or as root if no user was specified.
-.PP
-xdg\-su is for use inside a desktop session only.
-.PP
-xdg\-su discards any stdout and stderr output from
-\fIcommand\fR.
-.SH "OPTIONS"
-.TP
-\fB\-u \fR\fB\fIuser\fR\fR
-run
-\fIcommand\fR
-as
-\fIuser\fR. The default is to run as root.
-.TP
-\fB\-\-help\fR
-Show command synopsis.
-.TP
-\fB\-\-manual\fR
-Show this manualpage.
-.TP
-\fB\-\-version\fR
-Show the xdg\-utils version information.
-.SH "EXIT CODES"
-.PP
-An exit code of 0 indicates success while a non\-zero exit code indicates failure. The following failure codes can be returned:
-.TP
-\fB1\fR
-Error in command line syntax.
-.TP
-\fB2\fR
-One of the files passed on the command line did not exist.
-.TP
-\fB3\fR
-A required tool could not be found.
-.TP
-\fB4\fR
-The action failed.
-.SH "SEE ALSO"
-.PP
-\fBsu\fR(1)
-.SH "EXAMPLES"
-.PP
-.nf
-xdg\-su \-u root \-c "/opt/shinythings/bin/install\-GUI \-\-install fast"
-.fi
-.sp
-Runs the /opt/shinythings/bin/install\-GUI command with root permissions.
-.SH "AUTHOR"
-Kevin Krammer, Jeremy White. 
-.br
-<kevin.krammer@gmx.at>
-.br
-<jwhite@codeweavers.com>