Function openssl_sys::SSL_CTX_set_psk_client_callback

pub unsafe extern "C" fn SSL_CTX_set_psk_client_callback(
    ssl: *mut SSL_CTX, 
    psk_client_cb: Option<extern "C" fn(_: *mut SSL, _: *const c_char, _: *mut c_char, _: c_uint, _: *mut c_uchar, _: c_uint) -> c_uint>
)