Import upstream release 1.3.0

Closes: #951184

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+== libfido2
+
+image:https://api.travis-ci.org/Yubico/libfido2.svg?branch=master["Build Status (Travis)", link="https://travis-ci.org/Yubico/libfido2"]
+image:https://github.com/yubico/libfido2/workflows/windows/badge.svg["windows build status (github actions)", link="https://github.com/Yubico/libfido2/actions"]
+image:https://img.shields.io/badge/license-BSD-blue.svg["License", link="https://raw.githubusercontent.com/Yubico/libfido2/master/LICENSE"]
+
+*libfido2* provides library functionality and command-line tools to
+communicate with a FIDO device over USB, and to verify attestation and
+assertion signatures.
+
+*libfido2* supports the FIDO U2F (CTAP 1) and FIDO 2.0 (CTAP 2) protocols.
+
+For usage, see the `examples/` directory.
+
+=== License
+
+*libfido2* is licensed under the BSD 2-clause license.  See the _LICENSE_
+file for the full license text.
+
+=== Supported Platforms
+
+*libfido2* is known to work on Linux, MacOS, Windows, and OpenBSD.
+
+=== Documentation
+
+Documentation is available in troff and HTML formats. An
+https://developers.yubico.com/libfido2/Manuals/[online mirror of *libfido2*'s documentation]
+is also available.
+
+=== Installation
+
+==== Releases
+
+The current release of *libfido2* is 1.3.0. Please consult Yubico's
+https://developers.yubico.com/libfido2/Releases[release page] for source
+and binary releases.
+
+==== Ubuntu
+
+  $ sudo apt-add-repository ppa:yubico/stable
+  $ sudo apt update
+  $ sudo apt install libfido2-dev
+
+Or from source, on UNIX-like systems:
+
+  $ (rm -rf build && mkdir build && cd build && cmake ..)
+  $ make -C build
+  $ sudo make -C build install
+
+Depending on the platform, the PKG_CONFIG_PATH environment variable may need to
+be set.
+
+*libfido2* depends on https://github.com/pjk/libcbor[libcbor] and
+https://github.com/libressl-portable/portable[LibreSSL] (alternatively,
+https://www.openssl.org[OpenSSL] may be used). On Linux, libudev (part of
+https://www.freedesktop.org/wiki/Software/systemd[systemd]) is also required.
+
+For complete, OS-specific installation instructions, please refer to the
+`.travis/` (Linux, MacOS) and `windows/` directories.
+
+On Linux, you will need to add a udev rule to be able to access the FIDO
+device, or run as root. For example, the udev rule may contain the following:
+
+----
+#udev rule for allowing HID access to Yubico devices for FIDO support.
+
+KERNEL=="hidraw*", SUBSYSTEM=="hidraw", \
+  MODE="0664", GROUP="plugdev", ATTRS{idVendor}=="1050"
+----
+
+On Windows 1903 and newer versions, access to FIDO devices has been restricted
+to applications using the operating system's native API. Use of *libfido2*
+is still possible in privileged applications.
+
+=== OpenSSH Integration
+
+*libfido2* includes middleware allowing https://www.openssh.com[OpenSSH] to
+talk to U2F/FIDO2 devices. Note that server support is required for
+authentication. In a nutshell:
+
+==== Key Generation
+
+  $ ssh-keygen -t [ecdsa-sk|ed25519-sk] -w /path/to/libsk-libfido2.so
+
+==== Authentication
+
+  $ ssh-agent -P /path/to/libsk-libfido2.so
+  $ ssh-add -S /path/to/libsk-libfido2.so