Function libgit2_sys::git_cred_ssh_key_memory_new

pub unsafe extern fn git_cred_ssh_key_memory_new(out: *mut *mut git_cred,
                                                 username: *const c_char,
                                                 publickey: *const c_char,
                                                 privatekey: *const c_char,
                                                 passphrase: *const c_char)
                                                 -> c_int