Manual:$wgUseESI

HTTP proxy (CDN) settings: $wgUseESI
If you run Squid3 with ESI support, enable this.
Introduced in version:1.2.0
Deprecated in version:1.33.0 (Gerrit change 468607; git #d63684a0)
Removed in version:Still in use
Allowed values:(boolean)
Default value:false

Details

If you run Squid3 with ESI support, enable this.