- copy openvpn to openvpn25, mark as deprecated and to expire March 31
- update openvpn to openvpn 2.6.0, highlights from Frank Lichtenheld's
release announcement e-mail, slightly edited:
* Data Channel Offload (DCO) kernel acceleration support for Windows,
Linux, and FreeBSD [14].
* OpenSSL 3 support
* Improved handling of tunnel MTU, including support for pushable MTU.
* Outdated cryptographic algorithms disabled by default, but there are
options to override if necessary.
* Reworked TLS handshake, making OpenVPN immune to replay-packet state
exhaustion attacks.
* Added --peer-fingerprint mode for a more simplistic certificate setup
and verification.
* Improved protocol negotiation, leading to faster connection setup.
ChangeLog: https://github.com/OpenVPN/openvpn/blob/v2.6.0/Changes.rst
6853ab171e