devel/global: fix license and remove unnecessary Perl dependency
Fix LICENSE to reflect upstream COPYING file (multi-license: GPLv3+, LGPL20+, LGPL21+, BSD3CLAUSE, BSD4CLAUSE). Remove perl5 from USES as it is only needed by niche scripts not installed by the port. PR: [[ https://bugs.freebsd.org/279142 | 279142 ]] Submitted by: olce@FreeBSD.org Approved by: sunpoet@FreeBSD.org (maintainer timeout)