readme: update hostVerifier documentation

Author: mscdex

README.md

@@ -952,7 +952,7 @@ You can find more examples in the `examples` directory of this repository.
 
     * **hostHash** - _string_ - Any valid hash algorithm supported by node. The host's key is hashed using this algorithm and passed to the **hostVerifier** function as a hex string. **Default:** (none)
 
-    * **hostVerifier** - _function_ - Function with parameters `(hashedKey[, callback])` where `hashedKey` is a string hex hash of the host's key for verification purposes. Return `true` to continue with the handshake or `false` to reject and disconnect, or call `callback()` with `true` or `false` if you need to perform asynchronous verification. **Default:** (auto-accept if `hostVerifier` is not set)
+    * **hostVerifier** - _function_ - Function with parameters `(key[, callback])` for verifying host keys, where `key` is either a hex _string_ of the hash of the key if `hostHash` was set, otherwise it is the raw host key in _Buffer_ form. Use `utils.parseKey()` to get the host key type. Return `true` to continue with the handshake or `false` to reject and disconnect, or call `callback()` with `true` or `false` if you need to perform asynchronous verification. **Default:** (auto-accept if `hostVerifier` is not set)
 
     * **keepaliveCountMax** - _integer_ - How many consecutive, unanswered SSH-level keepalive packets that can be sent to the server before disconnection (similar to OpenSSH's ServerAliveCountMax config option). **Default:** `3`