Switch to side-by-side view

--- a/doc/Makefile
+++ b/doc/Makefile
@@ -7,7 +7,7 @@
 all: upmpdcli-manual.html upmpdcli-or-mpdupnp.html \
      releases.html mpdas-upnp.html upmpdcli-cloud.html
 
-upmpdcli.html: upmpdcli.txt upmpdcli-config.txt
+upmpdcli-manual.html: upmpdcli-manual.txt upmpdcli-config.txt
 
 clean:
 	rm -f *.html