Feature request for ssh-add

[Loganaden Velvindron]

Ajay Ramjatan asks if it would be ok to have:

A config file that contains list of DSA/RSA/ED25519 entries to be
added, when run by default.

Currently According to the man page:
"
Alternative file names can be given on the command line. If any file
requires a passphrase, ssh-add asks for the passphrase from the user.
"

Instead of specifying each key file, a single file such as .config
would contain:
AgentDefaultKey ~/.ssh/client1_rsa.private ~/.ssh/client2_ed25519
~/.ssh/client3_ed25519.