Debian has already put the info docs for gnu make and the docs for gpg to a package in the non-free section. This doesn't mean anything more than that it can't be in the standard installation. You can still install these packages, provided you keep the license for each package separately. As lots of documentation has already not been in the default installation for space reason, and it's quite appropriate to do this with something like the documentation of perl, as while you need the perl binary and modules to run programs, you only need the documentation if you actually want to develop perl programs.