sysutils/fusefs-s3fs: Update to 1.83

Dmitri Goutnik <dg@syrec.org> takes maintainership.

Port changes:

• Added PATCH_SITES/PATCHFILES for the pull request with FreeBSD patches submitted by the new maintainer
• Added LICENSE_FILE
• Added USE_GNOME=libxml2
• Removed the unnecessary patch from post-patch

PR: 226313
Submitted by: Dmitri Goutnik <dg@syrec.org>
Approved by: tcberner (mentor, implicit)