Bump bundled llhttp to 9.2.1

CVE-2024-27982

Adjust tests that relied on header folding.

Fixes: #111

tests/test_parser.py

@@ -6,12 +6,10 @@
 
 RESPONSE1_HEAD = b'''HTTP/1.1 200 OK
 Date: Mon, 23 May 2005 22:38:34 GMT
-Server: Apache/1.3.3.7
-        (Unix) (Red-Hat/Linux)
+Server: Apache/1.3.3.7 (Unix) (Red-Hat/Linux)
 Last-Modified: Wed, 08 Jan 2003 23:11:55 GMT
 ETag: "3f80f-1b6-3e1cb03b"
-Content-Type: text/html;
-  charset=UTF-8
+Content-Type: text/html; charset=UTF-8
 Content-Length: 130
 Accept-Ranges: bytes
 Connection: close
@@ -89,7 +87,7 @@ def test_parser_response_1(self):
         self.assertEqual(len(headers), 8)
         self.assertEqual(headers.get(b'Connection'), b'close')
         self.assertEqual(headers.get(b'Content-Type'),
-                         b'text/html;  charset=UTF-8')
+                         b'text/html; charset=UTF-8')
 
         self.assertFalse(m.on_body.called)
         p.feed_data(bytearray(RESPONSE1_BODY))