Patch that fixes the skipping of the HTML_PARSE_NOIMPLIED flag

For https://bugzilla.gnome.org/show_bug.cgi?id=642916

I just noticed that the HTML_PARSE_NOIMPLIED flag that you can pass to the
HTML-Parser methods doesn't do anything. Its intended purpose is to stop the
HTML-parser from forcibly adding a pair of html/body tags if the stream does
not contain any.

This is highly useful when you don't need this level of strictness.
Unfortunately, specifying it doesn't work, because the option is not
copied into the parsing context.
diff --git a/HTMLparser.c b/HTMLparser.c
index bf15c6a..d1cbc39 100644
--- a/HTMLparser.c
+++ b/HTMLparser.c
@@ -6587,6 +6587,10 @@
 	ctxt->options |= HTML_PARSE_IGNORE_ENC;
         options -= HTML_PARSE_IGNORE_ENC;
     }
+    if (options & HTML_PARSE_NOIMPLIED) {
+        ctxt->options |= HTML_PARSE_NOIMPLIED;
+        options -= HTML_PARSE_NOIMPLIED;
+    }
     ctxt->dictNames = 0;
     return (options);
 }