Revert "Introducing PREFIX, default makefile variable on FreeBSD". Using INSTALL_PREFIX=... is sufficient.
Revert "Introducing PREFIX, default makefile variable on FreeBSD". Using INSTALL_PREFIX=... is sufficient.

This reverts commit d18286aa72940c1030aaadab8944e42b4932f6e6.

danteinforno/neko,danteinforno/neko,danteinforno/neko