Update libexpat to version 2.2.1 which has some security fixes.

- CVE-2017-9233 CVE-2016-9063 CVE-2016-5300 CVE-2016-4472 CVE-2016-0718
  CVE-2015-2716 CVE-2015-1283 CVE-2012-6702 CVE-2012-0876 have been
  addressed.  Not all of them affect OpenBSD as we had fixes before.
- Upstream uses arc4random_buf(3) now.  Delete all code for other
  entropy sources to make sure to compile the correct one.  Our
  library already used arc4random(3) before.
- The overflow fixes in rev 1.11 and 1.12 of lib/xmlparse.c
  have been commited upstream in a different way.  Use the upstream
  code to make maintenance easier.
- Although it should be ABI compatible, there is a new global
  symbol align_limit_to_full_utf8_characters.  As it is in
  lib/internal.h, add a Symbols.map to restrict the export.  Do not
  bump the shared library version.
- Use the internal expat's siphash.h.
ports build ajacoutot@; move ahead deraadt@

1 files changed, 8 insertions, 5 deletions

diff --git a/lib/libexpat/examples/elements.c b/lib/libexpat/examples/elements.c
index bc04b6b1515..fe1699c50e8 100644
--- a/lib/libexpat/examples/elements.c
+++ b/lib/libexpat/examples/elements.c
@@ -6,11 +6,7 @@
 */
 
 #include <stdio.h>
-#include "expat.h"
-
-#if defined(__amigaos__) && defined(__USE_INLINE__)
-#include <proto/expat.h>
-#endif
+#include <expat.h>
 
 #ifdef XML_LARGE_SIZE
 #if defined(XML_USE_MSC_EXTENSIONS) && _MSC_VER < 1400
@@ -27,6 +23,8 @@ startElement(void *userData, const char *name, const char **atts)
 {
   int i;
   int *depthPtr = (int *)userData;
+  (void)atts;
+
   for (i = 0; i < *depthPtr; i++)
     putchar('\t');
   puts(name);
@@ -37,6 +35,8 @@ static void XMLCALL
 endElement(void *userData, const char *name)
 {
   int *depthPtr = (int *)userData;
+  (void)name;
+
   *depthPtr -= 1;
 }
 
@@ -47,6 +47,9 @@ main(int argc, char *argv[])
   XML_Parser parser = XML_ParserCreate(NULL);
   int done;
   int depth = 0;
+  (void)argc;
+  (void)argv;
+
   XML_SetUserData(parser, &depth);
   XML_SetElementHandler(parser, startElement, endElement);
   do {