Backport to 1.21.1: [1.21.4] Revert Registries to Frozen on Disconnect when a connection is present

[neoforged-automation]

Backport of #1934 to 1.21.1

Fixes #1932 on 1.21.1

[neoforged-pr-publishing]

• Publish PR to GitHub Packages

Last commit published: 254c2c095a152a1512feffb3dd23367fffb06149.

PR Publishing

The artifacts published by this PR:

• 📦 net.neoforged:neoforge:21.1.117-pr-1944-backport-1.21.1-1934
• 📦 net.neoforged:testframework:21.1.117-pr-1944-backport-1.21.1-1934

Repository Declaration

In order to use the artifacts published by the PR, add the following repository to your buildscript:

repositories {
    maven {
        name 'Maven for PR #1944' // https://github.com/neoforged/NeoForge/pull/1944
        url 'https://prmaven.neoforged.net/NeoForge/pr1944'
        content {
            includeModule('net.neoforged', 'neoforge')
            includeModule('net.neoforged', 'testframework')
        }
    }
}

MDK installation

In order to setup a MDK using the latest PR version, run the following commands in a terminal.
The script works on both *nix and Windows as long as you have the JDK bin folder on the path.
The script will clone the MDK in a folder named NeoForge-pr1944.
On Powershell you will need to remove the -L flag from the curl invocation.

mkdir NeoForge-pr1944
cd NeoForge-pr1944
curl -L https://prmaven.neoforged.net/NeoForge/pr1944/net/neoforged/neoforge/21.1.117-pr-1944-backport-1.21.1-1934/mdk-pr1944.zip -o mdk.zip
jar xf mdk.zip
rm mdk.zip || del mdk.zip

To test a production environment, you can download the installer from here.

[embeddedt]

Verified that this works on 1.21.1.

[neoforged-releases]

🚀 This PR has been released as NeoForge version 21.1.116.