"down for maintenance" plugin?

[Phillip B Oldham]

I seem to remember there was a plugin for nginx would bypass all 
requests and issue a single "down for maintenance" response, until a 
certain file was removed/renamed.

I can't find it on the wiki though. Was I imagining the plugin?
-- 

*Phillip B Oldham*
The Activity People
phill at theactivitypeople.co.uk <mailto:phill at theactivitypeople.co.uk>

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