default --private-key value in documentation is misleading #320
Description
The default value of --private-key documented on the manpage depends on which file just happened to exist on the build machine. This could mislead people into thinking that eg. /home/buildozer/.ssh/id_ed25519 is actually the default value but a correct documentation would look something like $HOME/.ssh/id_{ed25519,ed25519_sk,ecdsa,ecdsa_sk,dsa,rsa}. Is there any chance to show the actual default in the manpage?