<module>mod_isapi</module>, ...</dt>
<dd>Translation of headers to environment variables is more strict than
before to mitigate some possible cross-site-scripting attacks via header
- injection. Headers containing invalid characters (including underscores)
- are now silently dropped. <a href="env.html">Environment Variables
+ injection. Header names containing invalid characters (including underscores)
+ are no longer converted to environment variables. <a href="env.html">Environment Variables
in Apache</a> has some pointers on how to work around broken legacy
clients which require such headers. (This affects all modules which
use these environment variables.)</dd>