Escaping HTML in posts.

boards/mdx_neboard.py

@@ -179,7 +179,7 b' neboard_extension = make_extension()'
 
 def markdown_extended(markup):
     return markdown.markdown(markup, [neboard_extension, 'nl2br'],
-                             safe_mode=True)
+                             safe_mode='escape')
 
 formatters = [
     QuotePattern,