(PECL)
Note: The publickey subsystem is used for managing publickeys on a server to which the client is already authenticated. To authenticate to a remote system using publickey authentication, use the ssh2_auth_pubkey_file() function instead.
Publickey Subsystem Resource
Publickey algorithm (e.g.): ssh-dss, ssh-rsa
Publickey blob as raw binary data
Returns TRUE on success or FALSE on failure.
