[1.18.x] Fix FMLOnly in forgedev and userdev (MinecraftForge#8512)

Signed-off-by: SizableShrimp <[email protected]>

fmlonly/src/main/java/net/minecraftforge/fmlonly/FMLOnlyBindings.java

@@ -1,3 +1,8 @@
+/*
+ * Minecraft Forge - Forge Development LLC
+ * SPDX-License-Identifier: LGPL-2.1-only
+ */
+
 package net.minecraftforge.fmlonly;
 
 import net.minecraftforge.eventbus.api.BusBuilder;

fmlonly/src/main/java/net/minecraftforge/fmlonly/FMLOnlyMod.java

@@ -0,0 +1,11 @@
+/*
+ * Minecraft Forge - Forge Development LLC
+ * SPDX-License-Identifier: LGPL-2.1-only
+ */
+
+package net.minecraftforge.fmlonly;
+
+import net.minecraftforge.fml.common.Mod;
+
+@Mod("fmlonly")
+public class FMLOnlyMod {}

fmlonly/src/main/java/net/minecraftforge/fmlonlyclient/ClientModLoader.java

@@ -1,20 +1,6 @@
 /*
- * Minecraft Forge
- * Copyright (c) 2016-2021.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation version 2.1
- * of the License.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * Minecraft Forge - Forge Development LLC
+ * SPDX-License-Identifier: LGPL-2.1-only
  */
 
 package net.minecraftforge.fmlonlyclient;

fmlonly/src/main/resources/META-INF/mods.toml

@@ -0,0 +1,16 @@
+modLoader="javafml"
+loaderVersion="[24,]"
+issueTrackerURL="https://www.minecraftforge.net/"
+license="LGPL v2.1"
+
+[[mods]]
+modId="fmlonly"
+# We use the global forge version
+version="${global.forgeVersion}"
+updateJSONURL="https://files.minecraftforge.net/net/minecraftforge/forge/promotions_slim.json"
+displayName="Forge"
+credits="Anyone who has contributed on Github and supports our development"
+authors="LexManos,cpw"
+description='''
+    Forge, a broad compatibility API.
+    '''