prop224: Add functions to check for HS v3 support
This is groundwork for prop224.
It simply adds two functions for to nodelist.h that checks for v3 hsdir support (HSDir 3 protover) and ed25519 intro point (HSIntro 4 protover).
This is groundwork for prop224.
It simply adds two functions for to nodelist.h that checks for v3 hsdir support (HSDir 3 protover) and ed25519 intro point (HSIntro 4 protover).