Allow octets > 127 in path components.

- This is non-spec behavior, but it appears that most HTTP servers
  implicitly support non-ASCII characters when parsing path components.
  Extend http-parser to allow this.
- Fill out slots [128, 256) in normal_url_char[] with 1 so that these
  high octets are accepted in path components.
- Add unit test for paths that include such non-ASCII characters.

Fixes #37.

http_parser.c

@@ -186,7 +186,28 @@ static const uint8_t normal_url_char[256] = {
 /* 112  p   113  q   114  r   115  s   116  t   117  u   118  v   119  w  */
         1,       1,       1,       1,       1,       1,       1,       1,
 /* 120  x   121  y   122  z   123  {   124  |   125  }   126  ~   127 del */
-        1,       1,       1,       1,       1,       1,       1,       0 };
+        1,       1,       1,       1,       1,       1,       1,       0,
+
+/* Remainder of non-ASCII range are accepted as-is to support implicitly UTF-8
+   encoded paths. This is out of spec, but clients generate this and most other
+   HTTP servers support it. We should, too. */
+
+        1,       1,       1,       1,       1,       1,       1,       1,
+        1,       1,       1,       1,       1,       1,       1,       1,
+        1,       1,       1,       1,       1,       1,       1,       1,
+        1,       1,       1,       1,       1,       1,       1,       1,
+        1,       1,       1,       1,       1,       1,       1,       1,
+        1,       1,       1,       1,       1,       1,       1,       1,
+        1,       1,       1,       1,       1,       1,       1,       1,
+        1,       1,       1,       1,       1,       1,       1,       1,
+        1,       1,       1,       1,       1,       1,       1,       1,
+        1,       1,       1,       1,       1,       1,       1,       1,
+        1,       1,       1,       1,       1,       1,       1,       1,
+        1,       1,       1,       1,       1,       1,       1,       1,
+        1,       1,       1,       1,       1,       1,       1,       1,
+        1,       1,       1,       1,       1,       1,       1,       1,
+        1,       1,       1,       1,       1,       1,       1,       1,
+        1,       1,       1,       1,       1,       1,       1,       1 };
 
 
 enum state

test.c

@@ -557,7 +557,7 @@ const struct message requests[] =
   ,.body= ""
   }
 
-#define MSEARCH_REQ 19
+#define MSEARCH_REQ 20
 , {.name= "m-search request"
   ,.type= HTTP_REQUEST
   ,.raw= "M-SEARCH * HTTP/1.1\r\n"
@@ -582,6 +582,27 @@ const struct message requests[] =
   ,.body= ""
   }
 
+#define UTF8_PATH_REQ 21
+, {.name= "utf-8 path request"
+  ,.type= HTTP_REQUEST
+  ,.raw= "GET /δ¶/δt/pope?q=1#narf HTTP/1.1\r\n"
+         "Host: github.com\r\n"
+         "\r\n"
+  ,.should_keep_alive= TRUE
+  ,.message_complete_on_eof= FALSE
+  ,.http_major= 1
+  ,.http_minor= 1
+  ,.method= HTTP_GET
+  ,.query_string= "q=1"
+  ,.fragment= "narf"
+  ,.request_path= "/δ¶/δt/pope"
+  ,.request_url= "/δ¶/δt/pope?q=1#narf"
+  ,.num_headers= 1
+  ,.headers= { {"Host", "github.com" }
+             }
+  ,.body= ""
+  }
+
 , {.name= NULL } /* sentinel */
 };