Use libsodium from iohk fork -- not version from ports

[swinful]

Raised by @reqlez : Consider using recommended iohk libsodium fork instead of one from system.

git clone https://github.com/input-output-hk/libsodium
cd libsodium
git checkout 66f017f1
./autogen.sh
./configure
make
sudo make install
GitHub
GitHub - input-output-hk/libsodium: A modern, portable, easy to use...
A modern, portable, easy to use crypto library. Contribute to input-output-hk/libsodium development by creating an account on GitHub.

and then ...
nano .shrc #add exports to shell file:

export LD_LIBRARY_PATH="/usr/local/lib:$LD_LIBRARY_PATH"
export PKG_CONFIG_PATH="/usr/local/lib/pkgconfig:$PKG_CONFIG_PATH"