"?" should not be escaped

src/core/ngx_string.c

diff --git a/src/core/ngx_string.c b/src/core/ngx_string.c
index 7b5287f..032ae4d 100644
--- a/src/core/ngx_string.c
+++ b/src/core/ngx_string.c
@@ -1025,7 +1025,7 @@
         0xffffffff, /* 1111 1111 1111 1111  1111 1111 1111 1111 */
 
                     /* ?>=< ;:98 7654 3210  /.-, +*)( '&%$ #"!  */
-        0x800000ad, /* 0000 0000 0000 0000  0000 0000 1010 1101 */
+        0x000000ad, /* 0000 0000 0000 0000  0000 0000 1010 1101 */
 
                     /* _^]\ [ZYX WVUT SRQP  ONML KJIH GFED CBA@ */
         0x00000000, /* 0000 0000 0000 0000  0000 0000 0000 0000 */