Update tlslite to 0.4.6.

third_party/tlslite/tlslite/utils/pycrypto_rc4.py

+# Author: Trevor Perrin
+# See the LICENSE file for legal information regarding use of this file.
+
 """PyCrypto RC4 implementation."""
 
-from cryptomath import *
-from rc4 import *
+from .cryptomath import *
+from .rc4 import *
 
 if pycryptoLoaded:
     import Crypto.Cipher.ARC4
 
     def new(key):
         return PyCrypto_RC4(key)
 
     class PyCrypto_RC4(RC4):
 
         def __init__(self, key):
             RC4.__init__(self, key, "pycrypto")
+            key = bytes(key)
             self.context = Crypto.Cipher.ARC4.new(key)
 
         def encrypt(self, plaintext):
-            return self.context.encrypt(plaintext)
+            plaintext = bytes(plaintext)
+            return bytearray(self.context.encrypt(plaintext))
 
         def decrypt(self, ciphertext):
-            return self.context.decrypt(ciphertext)
+            ciphertext = bytes(ciphertext)
+            return bytearray(self.context.decrypt(ciphertext))