debian/control: build-depend on python3-sphinx instead of python-sphinx

python2 is going to be deprecated, and python3-sphinx is available all
the way back to oldoldstable.  let's use the more modern version.

To make this work and still ship the manpages, tell ./configure to
prefer python3 over python, if it exists.

1 files changed, 1 insertions, 1 deletions

diff --git a/configure b/configure
index 1bf52319..b7d27ea0 100755
--- a/configure
+++ b/configure
@@ -556,7 +556,7 @@ fi
 printf "Checking for python... "
 have_python=0
 
-for name in ${PYTHON} python python2 python3; do
+for name in ${PYTHON} python3 python python2; do
     if command -v $name > /dev/null; then
 	have_python=1
 	python=$name