Requests and SNI

Message headers

From: noscript <name@example.com>

Subject: Requests and SNI

Date: Mon, 26 Sep 2022 07:36:02 -0000 (UTC)

Message-ID: <tgrkp2$3mggi$1@dont-email.me>

In the request description (section 2) of the gemini specification, there is:

Gemini requests are a UTF-8 encoded absolute URL, including a scheme

Sending an absolute URL permits virtual hosting of multiple Gemini

domains on the same IP address.

And TLS section 4, there is:

Use of the Server Name Indication (SNI) extension to TLS is also mandatory,

to facilitate name-based virtual hosting.

The SNI seems redundant because the hostname is in the request already.

What is the reason to have SNI mandatory?

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