cvsweb: Partial merge of rev.

cvsweb: Partial merge of rev.

[schwarze]

Log Message:
-----------
Partial merge of rev. 3.119.2.15; the rest will be fixed differently
because the original diff caused regressions.

Original commit message:
Patch from Peter J. Philipp <pjp at centroid dot eu>
to fix some opportunities for XSS;
triggered by a report from Ezio Paglia.

Modified Files:
--------------
    cvsweb:
        cvsweb.cgi

Revision Data
-------------
Index: cvsweb.cgi
===================================================================
RCS file: /home/cvs/mandoc/cvsweb/cvsweb.cgi,v
retrieving revision 4.6
retrieving revision 4.7
diff -Lcvsweb.cgi -Lcvsweb.cgi -u -p -r4.6 -r4.7
--- cvsweb.cgi
+++ cvsweb.cgi
@@ -4194,6 +4194,7 @@ sub htmlquote($)
   # Special Characters; RFC 1866
   s/&/&amp;/g;
   s/\"/&quot;/g;
+  s/%22/&quot;/g;
   s/</&lt;/g;
   s/>/&gt;/g;
   return $_;
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