pkgin now depends on pkg_install. If pkg_install appears after pkgin
in PREINSTALLED_PACKAGES, there will be an error because pkg_install
was installed as a dependency for pkgin.
As the build system can now generate a full root file system,
there is no need to bootstrap the iso image by copying over
files from the currently system.
The SVN references have also been mostly taken out, as they are
not anymore valid. Some cleanup have been done to try to improve
the readability of the script.
Also fix a potential issue where host tools would be compiled
dynamically under MINIX.
This also updates proto.common.dynamic to use the new placement
of the dynamic libraries (/usr/lib)
