Allow RSA signatures using SHA-1 hash algorithm

This was disabled by default at openssh 8.8 but is still used by some
git implementations eg Azure DevOps

Signed-off-by: David Hotham <[email protected]>

Author: dimbleby

docker/ssh_config

@@ -3,3 +3,5 @@ StrictHostKeyChecking yes
 IdentityFile /etc/fluxd/ssh/identity
 IdentityFile /var/fluxd/keygen/identity
 LogLevel error
+HostkeyAlgorithms +ssh-rsa
+PubkeyAcceptedAlgorithms +ssh-rsa