Fedora 34: 2021-67c946a9f3 Critical: libdxfrw Buffer Overflow Fix

libdxfrw is a free C++ library to read and write DXF files in both formats,

ASCII and binary form.

Update libdxfrw to 1.0.1 (from upstream git). Rebuild librecad against it. This

fixes CVE-2021-21898, CVE-2021-21899, and CVE-2021-21900.

* Mon Nov 22 2021 Tom Callaway - 1.0.1-1

- rebase to new code home, fixes CVE-2021-21898/21899/21900

* Thu Jul 22 2021 Fedora Release Engineering - 0.6.3-19

- Rebuilt for https://fedoraproject.org/wiki/Fedora_35_Mass_Rebuild

* Thu May 27 2021 Tom Callaway - 0.6.3-18

- disable rpath

[ 1 ] Bug #2025628 - CVE-2021-21899 librecad: heap out-of-bounds write in dwgCompressor:copyCompBytes21

https://bugzilla.redhat.com/show_bug.cgi?id=2025628

[ 2 ] Bug #2025631 - CVE-2021-21900 librecad: use-after-free in dxfRW:processLType()

https://bugzilla.redhat.com/show_bug.cgi?id=2025631

[ 3 ] Bug #2025634 - CVE-2021-21898 librecad: out-of-bounds write in dwgCompressor:decompress18()

https://bugzilla.redhat.com/show_bug.cgi?id=2025634

su -c 'dnf upgrade --advisory FEDORA-2021-67c946a9f3' at the command

line. For more information, refer to the dnf documentation available at

https://dnf.readthedocs.io/en/latest/command_ref.html

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