Log Message:
py-asyncssh: updated to 2.6.0

Release 2.6.0 (1 May 2021)

Added support for the HostKeyAlias client config option and a corresponding \ 
host_key_alias option, allowing known_hosts lookups and host certificate \ 
validation to be done against a different hoetname than what is used to make the \ 
connection. Thanks go to Pritam Baral for contributing this feature!

Added the capability to specify client channel options as connection options, \ 
allowing them to be set in a connect() call or as values in \ 
SSHClientConnectionOptions. These values will act as defaults for any sessions \ 
opened on the connection but can still be overridden via arguments in the \ 
create_session() call.

Added support for dynamically updating SSH options set up in a listen() or \ 
listen_reverse() call. A new SSHAcceptor class is now returned by these calls \ 
which has an update() method which takes the same keyword arguments as \ 
SSHClientConnectionOptions or SSHServerConnectionOptions, allowing you to update \ 
any of the options on an existing listener except those involved in setting up \ 
the listening sockets themselves. Updates will apply to future connections \ 
accepted by that listener.

Added support for a number of algorithms supported by the ssh.com Tectia SSH \ 
client/server:

Key exchange:

diffie-hellman-group14-sha256@ssh.com (enabled by default)
diffie-hellman-group14-sha224@ssh.com (available but not default)
diffie-hellman-group15-sha256@ssh.com
diffie-hellman-group15-sha384@ssh.com
diffie-hellman-group16-sha384@ssh.com
diffie-hellman-group16-sha512@ssh.com
diffie-hellman-group18-sha512@ssh.com
HMAC:

hmac-sha256-2@ssh.com (all enabled by default)
hmac-sha224@ssh.com
hmac-sha256@ssh.com
hmac-sha384@ssh.com
hmac-sha512@ssh.com
RSA public key algorithms:

ssh-rsa-sha224@ssh.com (all enabled by default)
ssh-rsa-sha256@ssh.com
ssh-rsa-sha384@ssh.com
ssh-rsa-sha512@ssh.com
Encryption:

seed-cbc@ssh.com (available but not default)
Added a new ‘ignore-failure’ value to the x11_forwarding argument in \ 
create_session(). When specified, AsyncSSH will attempt to set up X11 forwarding \ 
but ignore failures, behaving as if forwarding was never requested instead of \ 
raising a ConnectionOpenError.

Extended support for replacing certificates in an SSHKeyPair, allowing alternate \ 
certificates to be used with SSH agent and PKCS11 keys. This provides a way to \ 
use X.509 certificates with an SSH agent key or OpenSSH certificates with a \ 
PKCS11 key.

Extended the config file parser to support ‘=’ as a delimiter between \ 
keywords and arguments. While this syntax appears to be rarely used, it is \ 
supported by OpenSSH.

Updated Fido2 support to use version 0.9.1 of the fido2 package, which included \ 
some changes that were not backward compatible with 0.8.1.

Fixed problem with setting config options with percent substitutions to \ 
‘none’. Percent subsitution should not be performed in this case. Thanks go \ 
to Yuqing Miao for finding and reporting this issue!

Fixed return type of filenames in SFTPClient scandir() and readlink() when the \ 
argument passed in is a Path value. Previously, the return value in this case \ 
was bytes, but that was only meant to apply when the input argument was passed \ 
as bytes.

Fixed a race condition related to closing a channel before it is fully open, \ 
preventing a client from potentially hanging forever if a session was closed \ 
while the client was still attempting to request a PTY or make other requests as \ 
part of opening the session.

Fixed a potential race condition related to making parallel calls to SFTPClient \ 
makedirs() which try to create the same directory or a common parent directory.

Fixed RFC 4716 parser to allow colons in header values.

Improved error message when AsyncSSH is unable to get the local username on a \ 
client. Thanks go to Matthew Plachter for reporting this issue.