Manual:$wgAssumeProxiesUseDefaultProtocolPorts/en

From Linux Web Expert

<translate> Server URLs and file paths</translate>: $wgAssumeProxiesUseDefaultProtocolPorts
When the wiki is running behind a proxy and this is set to true, assumes that the proxy exposes the wiki on the standard ports.
<translate> Introduced in version:</translate>1.26.0 (Gerrit change 219901; git #b2768298)
<translate> Removed in version:</translate><translate> still in use</translate>
<translate> Allowed values:</translate>(boolean)
<translate> Default value:</translate>true

Details

When the wiki is running behind a proxy and this is set to true, assumes that the proxy exposes the wiki on the standard ports (443 for HTTPS and 80 for HTTP).