Add FML config to disable DFU optimizations client-side. (#8842)

* Add client-side command line argument to disable DFU optimizations.

* Switch to using FMLConfig value instead.

fmlloader/src/main/java/net/minecraftforge/fml/loading/FMLConfig.java

@@ -29,6 +29,7 @@ public class FMLConfig
         configSpec.define("maxThreads", -1);
         configSpec.define("versionCheck", Boolean.TRUE);
         configSpec.define("defaultConfigPath",  "defaultconfigs");
+        configSpec.define("disableOptimizedDFU", Boolean.TRUE);
     }
 
     private CommentedFileConfig configData;
@@ -88,4 +89,8 @@ public class FMLConfig
     public static String defaultConfigPath() {
         return INSTANCE.configData.<String>getOptional("defaultConfigPath").orElse("defaultconfigs");
     }
+
+    public static boolean isOptimizedDFUDisabled() {
+        return INSTANCE.configData.<Boolean>getOptional("disableOptimizedDFU").orElse(Boolean.TRUE);
+    }
 }

fmlloader/src/main/resources/META-INF/defaultfmlconfig.toml

@@ -4,3 +4,5 @@ splashscreen = true
 maxThreads = -1
 # Enable forge global version checking
 versionCheck = true
+# Disables Optimized DFU client-side.
+disableOptimizedDFU = true

patches/minecraft/net/minecraft/client/main/Main.java.patch

@@ -1,5 +1,13 @@
 --- a/net/minecraft/client/main/Main.java
 +++ b/net/minecraft/client/main/Main.java
+@@ -49,6 +_,7 @@
+    @DontObfuscate
+    public static void main(String[] p_129642_) {
+       SharedConstants.m_142977_();
++      if (!net.minecraftforge.fml.loading.FMLConfig.isOptimizedDFUDisabled())
+       SharedConstants.m_214358_();
+       OptionParser optionparser = new OptionParser();
+       optionparser.allowsUnrecognizedOptions();
 @@ -135,7 +_,7 @@
        }