Update http-parser to 2.6.2

Fixes a header parsing bug for obstext characters (> 0x80)

Adaption of nodejs/node@954a4b4b:

    Author: James M Snell <jasnell@gmail.com>
    Date:   Mon Feb 15 09:40:58 2016 -0800

    deps: update to http-parser 2.6.2

    Fixes http-parser regression with IS_HEADER_CHAR check
    Add test case for obstext characters (> 0x80) is header

    PR-URL: nodejs/node#5237
    Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
    Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>
    Reviewed-By: Myles Borins <myles.borins@gmail.com>

PR-URL: #287
Reviewed-By: James M Snell <jasnell@gmail.com>

Makefile

@@ -22,14 +22,14 @@ PLATFORM ?= $(shell sh -c 'uname -s | tr "[A-Z]" "[a-z]"')
 HELPER ?=
 BINEXT ?=
 ifeq (darwin,$(PLATFORM))
-SONAME ?= libhttp_parser.2.6.1.dylib
+SONAME ?= libhttp_parser.2.6.2.dylib
 SOEXT ?= dylib
 else ifeq (wine,$(PLATFORM))
 CC = winegcc
 BINEXT = .exe.so
 HELPER = wine
 else
-SONAME ?= libhttp_parser.so.2.6.1
+SONAME ?= libhttp_parser.so.2.6.2
 SOEXT ?= so
 endif
 

http_parser.c

@@ -123,7 +123,7 @@ do {                                                                 \
     FOR##_mark = NULL;                                               \
   }                                                                  \
 } while (0)
-  
+
 /* Run the data callback FOR and consume the current byte */
 #define CALLBACK_DATA(FOR)                                           \
     CALLBACK_DATA_(FOR, p - FOR##_mark, p - data + 1)
@@ -440,7 +440,7 @@ enum http_host_state
  * character or %x80-FF
  **/
 #define IS_HEADER_CHAR(ch)                                                     \
-  (ch == CR || ch == LF || ch == 9 || (ch > 31 && ch != 127))
+  (ch == CR || ch == LF || ch == 9 || ((unsigned char)ch > 31 && ch != 127))
 
 #define start_state (parser->type == HTTP_REQUEST ? s_start_req : s_start_res)
 

http_parser.h

@@ -27,7 +27,7 @@ extern "C" {
 /* Also update SONAME in the Makefile whenever you change these. */
 #define HTTP_PARSER_VERSION_MAJOR 2
 #define HTTP_PARSER_VERSION_MINOR 6
-#define HTTP_PARSER_VERSION_PATCH 1
+#define HTTP_PARSER_VERSION_PATCH 2
 
 #include <sys/types.h>
 #if defined(_WIN32) && !defined(__MINGW32__) && \