To build man pages we need to invoke meson, but this also builds the html which
we don't want if doc flag is not set, so patch make & install and remove
html & pdf generation

--- a/doc/sphinx/install-docs.sh.in
+++ b/doc/sphinx/install-docs.sh.in
@@ -22,11 +22,5 @@
 docdir="${target_path}/@docdir@"
 mandir8="${target_path}/@mandir8@"
 
-mkdir -p "${docdir}/html"
-cp -r '@abs_sphinxbuilddir@/html'/* "${docdir}/html"
-if test '@HAVE_PDFLATEX@' != 'no'; then
-    @INSTALL@ -c -m 644 @abs_sphinxbuilddir@/latex/kea-arm.pdf "${docdir}"
-    @INSTALL@ -c -m 644 @abs_sphinxbuilddir@/latex/kea-messages.pdf "${docdir}"
-fi
 mkdir -p "${mandir8}"
 @INSTALL@ -c -m 644 @abs_sphinxbuilddir@/man/*.8 "${mandir8}"
--- a/doc/sphinx/make-doc.sh.in
+++ b/doc/sphinx/make-doc.sh.in
@@ -15,26 +15,7 @@
 rm -f '@srcdir@/arm/platforms.rst'
 cp '@TOP_SOURCE_DIR@/platforms.rst' '@srcdir@/arm/platforms.rst'
 
-# html
-@SPHINXBUILD@ -M html @srcdir@ @sphinxbuilddir@ @sphinxopts@
-
-# singlehtml
-@SPHINXBUILD@ -M singlehtml @srcdir@ @sphinxbuilddir@ @sphinxopts@
-
-# text
-@SPHINXBUILD@ -M text @srcdir@ @sphinxbuilddir@ @sphinxopts@
 
 # mans
 @SPHINXBUILD@ -M man @srcdir@ @sphinxbuilddir@ @sphinxopts@
 
-# pdf
-if test '@HAVE_PDFLATEX@' != 'no'; then
-    @SPHINXBUILD@ -M latex @srcdir@ @sphinxbuilddir@ @sphinxopts@
-    cd '@abs_sphinxbuilddir@/latex'
-    @PDFLATEX_AND_OPTS@ kea-arm.tex
-    makeindex -s python.ist kea-arm.idx
-    @PDFLATEX_AND_OPTS@ kea-arm.tex
-    @PDFLATEX_AND_OPTS@ kea-messages.tex
-    makeindex -s python.ist kea-messages.idx
-    @PDFLATEX_AND_OPTS@ kea-messages.tex
-fi
--- a/doc/sphinx/meson.build
+++ b/doc/sphinx/meson.build
@@ -145,8 +145,6 @@
 )
 
 run_target('doc', command: [make_doc])
-run_target('mes-doc', command: [make_mes_doc])
-run_target('uml', command: [make_uml])
 run_target(
     'update-python-dependencies',
     command: [make_update_python_dependencies],