only escapce the first underline to satisfy asciidoc - weired!

Signed-off-by: Nico Schottelius <nico@kr.ethz.ch>

doc/dev/todo/niconext

@@ -1,5 +1,4 @@
 Cleanup documentation:
-   cleanly integrate speeches (pdf on website?)
    type reference -> add types + manpages
    add explorer reference
 

doc/man/cdist-reference.text.sh

@@ -140,9 +140,10 @@ for type in man7/cdist-type__*.text; do
    no_dir="${type#man7/}";
    no_type="${no_dir#cdist-type}";
    name="${no_type%.text}";
+   name_no_underline="$(echo $name | sed 's/^__/\\__/g')"
    man="${no_dir%.text}(7)"
 
-   echo "- $name" "($man)"
+   echo "- $name_no_underline" "($man)"
 done
 
 cat << eof