Maintenance 200
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Maintenance status
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Overview
The Maintenance 200 module allows a site to return a Status code of 200 rather than the default 503 (Service Unavailable) code.
"But wait," you ask, "why would I want that? The site is truly in a 503 state and should report that." The reason you'd want to return a 200 is so that your CDN or caching layer (e.g., Varnish) will cache the maintenance page and serve it to new requests rather than passing the request down to your origin server.
