Bug#1005699: opendht: Please switch from build-dependency libargon2-0-dev to libargon2-dev

[Gavin Henry]

Hi,

Can I help with this as I'd like to get us on to 2.3.5 when it's out
for my package:

https://mentors.debian.net/package/sentrypeer/

my v2.0.0 will depend on libopendht-dev for the C bindings

Thanks.