Missing dependencies in package detection

[RaitoBezarius]

Hi there, thank you for the amazing library.

I'm packaging the Netopeer2 suite in Nixpkgs/NixOS and I realized there were two hidden dependencies: PCRE2 (from libyang) and libxcrypt (for crypt.h).

I think it would make packaging easier to list them in the CMake machinery

[michalvasko]

Glad you appreciate it and I have added crypt to dependencies in the README, not sure what else to do. It should be expected that if a project depends on another, which then depends on some other project, then the first depends also on the third, dependencies are transitive, obviously. This does not have to be mentioned explicitly because netopeer2 nor libnetconf2 do not directly use PCRE2.