packages: Add a base-jail set

This is base, but without packages which are not generally useful
in jails. The following packages are excluded:

• Support for hardware not present in a jail: acpi, apm, bluetooth, ccdconfig, console-tools, cxgbe-tools, efi-tools, fd, hostapd, mlx-tools, nvme-tools, wpa

• Kernel facilities that don't work in a jail: dtrace, dwatch, ggate, hast, iscsi, libcuse, smbutils

All library packages are included in base-jail, even if they might not
work, because the user may have executables linked with them.

While here, remove the set-minimal dependency from set-devel, since
this will cause unnecessary packages to be installed in jails. This
means users will need to install set-devel in addition to their base
set (minimal or base), which bsdinstall already handles correctly.

Add a license to all the set UCL files, so people can redistribute them.

MFC after: 6 hours
Reviewed by: manu
Differential Revision: https://reviews.freebsd.org/D52719