make it really clear that vla != flexible arrays
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@117522 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/UsersManual.html b/docs/UsersManual.html
index a271dc3..f4e414a 100644
--- a/docs/UsersManual.html
+++ b/docs/UsersManual.html
@@ -889,7 +889,9 @@
<li>clang does not support the gcc extension that allows variable-length arrays
in structures. This is for a few of reasons: one, it is tricky
to implement, two, the extension is completely undocumented, and three, the
-extension appears to be rarely used.</li>
+extension appears to be rarely used. Note that clang <em>does</em> support
+flexible array members (arrays with a zero or unspecified size at the end of
+a structure).</li>
<li>clang does not support duplicate definitions of a function where one is
inline. This complicates clients of the AST which normally can expect there is