Possibility to add custom templates to hosts created from host prototypes

It is a good feature, that host prototypes are available for template linkage into LLD settings with custom Interfaces as well

But, at the same discovered hosts contain a lot of different services (DB, Web, etc) and we cannot just add all the templates for all services to host prototypes - it is useless.

It will be more flexible if hosts, created from the host prototype will be available for custom template linkage at any time after discovery