(from github.com/MajidSafari)
fess support ?
https://developers.google.com/webmasters/control-crawl-index/docs/robots_meta_tag
HTTP/1.1 200 OK
Date: Tue, 25 May 2010 21:42:43 GMT
(…)
X-Robots-Tag: noindex
(…)
(from github.com/marevol)
Not supported.