Also accept buffer in Connection.send and .sendall

Not at all sure what i am doing, but according to
http://hg.python.org/cpython/rev/9e718d8f71e8/, buffers are a accepted
type to pass to sendall in Python 2.6.
diff --git a/OpenSSL/test/test_ssl.py b/OpenSSL/test/test_ssl.py
index bfe3114..abc3bbe 100644
--- a/OpenSSL/test/test_ssl.py
+++ b/OpenSSL/test/test_ssl.py
@@ -2136,6 +2136,23 @@
             self.assertEquals(client.recv(2), b('xy'))
 
 
+    try:
+        buffer
+    except NameError:
+        "cannot test sending buffer without buffer"
+    else:
+        def test_short_buffer(self):
+            """
+            When passed a buffer containing a small number of bytes,
+            :py:obj:`Connection.send` transmits all of them and returns the number of
+            bytes sent.
+            """
+            server, client = self._loopback()
+            count = server.send(buffer(b('xy')))
+            self.assertEquals(count, 2)
+            self.assertEquals(client.recv(2), b('xy'))
+
+
 
 class ConnectionSendallTests(TestCase, _LoopbackMixin):
     """
@@ -2179,6 +2196,21 @@
             self.assertEquals(client.recv(1), b('x'))
 
 
+    try:
+        buffer
+    except NameError:
+        "cannot test sending buffers without buffers"
+    else:
+        def test_short_buffers(self):
+            """
+            When passed a buffer containing a small number of bytes,
+            :py:obj:`Connection.sendall` transmits all of them.
+            """
+            server, client = self._loopback()
+            server.sendall(buffer(b('x')))
+            self.assertEquals(client.recv(1), b('x'))
+
+
     def test_long(self):
         """
         :py:obj:`Connection.sendall` transmits all of the bytes in the string passed to