doc: changed section for man page of "wdread" to 1x for consistency

All the man pages for our tools that interact with Window Maker are placed
in the "1x" section, but the "wdread" page was an exception for no known
reason.

For consistency, this patch renames the file to the same "1x" section.

Signed-off-by: Christophe CURIS <christophe.curis@free.fr>

doc/Makefile.am

@@ -11,7 +11,7 @@ dist_man_MANS = \
 	seticons.1x \
 	setstyle.1x \
 	upgrade-windowmaker-defaults.8 \
-	wdread.1 \
+	wdread.1x \
 	wdwrite.1x \
 	WindowMaker.1x \
 	wmagnify.1x \

doc/wdread.1x

@@ -1,4 +1,4 @@
-.TH "wdread" "1" "15 August 2011"
+.TH wdread 1x "15 August 2011"
 .SH "NAME"
 \fBwdread\fR \- read value from defaults database
 .PP