build_recipe_v2.23.txt uses stale libupnpp-samples code

With this recipe, building upmpdcli and the libraries it depends on succeeded on a moOde 6.5.2 player but when I get to this step in the upmpdcli build section

5. upexplorer

NOTE: This also installs a bunch of other utils

sudo cp -r ./moode/other/libupnppsamples-code/ ./
cd libupnppsamples-code
sudo ./autogen.sh
sudo ./configure
sudo make
sudo make install
cd ~
sudo rm -rf ./libupnppsamples-code

I experience an error in compiling typedservice.cpp

src/typedservice.cpp:78:5: error: ‘sleep’ was not declared in this scope
     sleep(1000);
     ^~~~~

The build fails, and all the sample utilities in /usr/local/bin are the old ones, dated Feb 17, which were shipped with moOde 6.5.2.

Looking at Jean-Francois's new https://framagit.org/medoc92/libupnpp-samples I see that a year ago he has commits to "Fix a few things necessitated by libupnpp removing...."

I downloaded current master for the libupnpp-samples repo and built/installed all the utilities without error. Now all the sample utilities in /usr/local/bin are dated today.

In particular

-rwxr-xr-x 1 root root   1718220 Jun 28 15:45 upexplorer

moode-player / moode

build_recipe_v2.23.txt uses stale libupnpp-samples code #143