https://httpd.apache.org/docs/current/mod/core.html#usecanonicalname https://httpd.apache.org/docs/current/mod/core.html#usecanon... does say this: "If CGIs mak

https://httpd.apache.org/docs/current/mod/core.html#usecanonicalname https://httpd.apache.org/docs/current/mod/core.html#usecanon... does say this: "If CGIs make assumptions about the values of SERVER_NAME, they may be broken by this option. The client is essentially free to give whatever value they want as a hostname. But if the CGI is only using SERVER_NAME to construct self-referential URLs, then it should be just fine."