Phabricator Versions:
`phabricator f844280d360c8acd4c2864733efd8e58a5507d80 (Tue, Nov 29) `
`arcanist fad85844314b151994769a461825c90f7400c145 (Oct 22 2016) `
`phutil 3070098f1b6db23817a0dfced35d11d9c3615e04 (Wed, Nov 30) `
When the Webserver is set to handle the the WebSocket queries through rewrite rule:
RewriteCond %{HTTP:Upgrade} =websocket
RewriteRule /(.*) ws://localhost:22280/$1 [P,L]
RewriteCond %{HTTP:Upgrade} !=websocket
RewriteRule ^(.*)$ /index.php?__path__=$1 [B,L,QSA]
The notification system works, but the notification status `server/config/cluster/notifications/` gives the following error:
```
https server 443 Connection Error Got HTTP 200, but expected HTTP 501 (WebSocket Upgrade)!
```
Is it possible to set the `HTTP:Upgrade` header for the CURL check query?