Upgrade to expat 2.1.1
Modified the import_expat.sh script as the archive is now
compressed using bzip2 instead of gzip and uses configure.ac
instead of configure.in.
Modified README.android to make the example command up to date
with respect to the new archive format and also to ensure that
it builds dependencies.
All the remaining changes are straight from upstream.
Bug: 27818751
Change-Id: Ia4d587e98a3f68b7133cdbcb0ca952e18fffcfe8
diff --git a/doc/reference.html b/doc/reference.html
index 8811a33..a4ab405 100644
--- a/doc/reference.html
+++ b/doc/reference.html
@@ -2151,8 +2151,12 @@
function behavior. In order to have an effect this must be called
before parsing has started. Returns 1 if successful, 0 when called
after <code>XML_Parse</code> or <code>XML_ParseBuffer</code>.
-<p><b>Note:</b> This call is optional, as the parser will auto-generate a new
-random salt value if no value has been set at the start of parsing.</p>
+<p><b>Note:</b>This call is optional, as the parser will auto-generate
+a new random salt value if no value has been set at the start of parsing.
+<p><b>Note:</b>One should not call <code>XML_SetHashSalt</code> with a
+hash salt value of 0, as this value is used as sentinel value to indicate
+that <code>XML_SetHashSalt</code> has <b>not</b> been called. Consequently
+such a call will have no effect, even if it returns 1.</p>
</div>
<pre class="fcndec" id="XML_UseForeignDTD">