<p>Except in <a href="#early">early</a> mode, the
<code class="directive">Header</code> directives are processed just
before the response is sent to the network. These means that it is
- possible to set and/or override most headers, except for those headers
- added by the HTTP header filter, such as Content-Type.</p>
+ possible to set and/or override most headers, except for some headers
+ added by the HTTP header filter. Prior to 2.2.12, it was not possible
+ to change the Content-Type header with this directive.</p>
+
</div>
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