Squashed 'src/univalue/' content from commit 9ef5b78

git-subtree-dir: src/univalue
git-subtree-split: 9ef5b78c1998509b8f1ccd76f0aee15140e384be

test/no_nul.cpp

@@ -0,0 +1,8 @@
+#include "univalue.h"
+
+int main (int argc, char *argv[])
+{
+    char buf[] = "___[1,2,3]___";
+    UniValue val;
+    return val.read(buf + 3, 7) ? 0 : 1;
+}