maximed told me I could use texinfo in the description.

(I also removed a couple of lines in the C++ source because the
constant was not used.)

Also, I was advised to put the added source code in a local-file such
as what is done by gnuzilla, but I could not figure out how it was done
for gnuzilla (the package is quite large). If I go with a patch, there
are a lot of things that get deleted, so it makes a rather large patch.

What do you think?

Vivien