Update the embedded copy of the expat XML parser to 2.1.0. It brings
with it a vareity of bug fixes, both security and behavior. See
http://www.libexpat.org/ for the list.
NOTE: I already backported the expat hash randomization fix in March.
Fixes issue #14340.
diff --git a/Modules/expat/ascii.h b/Modules/expat/ascii.h
index 337e5bb..d10530b 100644
--- a/Modules/expat/ascii.h
+++ b/Modules/expat/ascii.h
@@ -83,3 +83,10 @@
#define ASCII_LSQB 0x5B
#define ASCII_RSQB 0x5D
#define ASCII_UNDERSCORE 0x5F
+#define ASCII_LPAREN 0x28
+#define ASCII_RPAREN 0x29
+#define ASCII_FF 0x0C
+#define ASCII_SLASH 0x2F
+#define ASCII_HASH 0x23
+#define ASCII_PIPE 0x7C
+#define ASCII_COMMA 0x2C