filters: apply HTML escaping

http://www.w3.org/International/questions/qa-escapes#use

diff --git a/filters/html-converters/txt2html b/filters/html-converters/txt2html
index a79599582a6cba461a58be9b85ef5f5293a1369e..495eeceb279e84f6b1e1a877b3adf416082ce41a 100755 (executable)
--- a/filters/html-converters/txt2html
+++ b/filters/html-converters/txt2html
@@ -1,4 +1,4 @@
 #!/bin/sh
 echo "<pre>"
-cat
+sed "s|&|\\&amp;|g;s|'|\\&apos;|g;s|\"|\\&quot;|g;s|<|\\&lt;|g;s|>|\\&gt;|g"
 echo "</pre>"