Revert "Add root/admin user detection (#2432)"

This reverts commit 555ca59af7.

Unknown issue on CentOS/RHEL(?) requires further examination.

Spigot-Server-Patches/0440-fix-blockstate-capture-undoing.patch

@@ -1,4 +1,4 @@
-From 6f341bdfd51609e529a4f9865f7775a57b1b4cc5 Mon Sep 17 00:00:00 2001
+From a9c21212ccc71c68ef17076e300d53a23a7ed836 Mon Sep 17 00:00:00 2001
 From: Trigary <trigary0@gmail.com>
 Date: Mon, 17 Feb 2020 22:53:33 +0100
 Subject: [PATCH] fix blockstate capture undoing
@@ -28,5 +28,5 @@ index 3c966b4ab..baad98517 100644
                  }
                  // CraftBukkit end
 -- 
-2.25.0
+2.16.1.windows.4
 

Spigot-Server-Patches/0442-Add-root-admin-user-detection.patch

@@ -1,86 +0,0 @@
-From 2f25bc9579085e0c3d522e972c79c6e4ae15a2de Mon Sep 17 00:00:00 2001
-From: egg82 <eggys82@gmail.com>
-Date: Thu, 8 Aug 2019 14:12:48 -0600
-Subject: [PATCH] Add root/admin user detection
-
-This patch detects whether or not the server is currently executing as a privileged user and spits out a warning.
-The warning serves as a sort-of PSA for newer server admins who don't understand the risks of running as root.
-We've seen plenty of bad/malicious plugins hit markets, and there's been a few close-calls with exploits in the past.
-Hopefully this helps mitigate some potential damage to servers, even if it is just a warning.
-
-diff --git a/src/main/java/com/destroystokyo/paper/util/ServerEnvironment.java b/src/main/java/com/destroystokyo/paper/util/ServerEnvironment.java
-new file mode 100644
-index 000000000..76bfae177
---- /dev/null
-+++ b/src/main/java/com/destroystokyo/paper/util/ServerEnvironment.java
-@@ -0,0 +1,38 @@
-+package com.destroystokyo.paper.util;
-+
-+import java.io.OutputStream;
-+import java.io.PrintStream;
-+import java.util.prefs.Preferences;
-+
-+public class ServerEnvironment {
-+    private static final boolean runningAsRootOrAdmin;
-+
-+    static {
-+        // https://stackoverflow.com/a/23538961
-+        Preferences prefs = Preferences.systemRoot();
-+        PrintStream err = System.err;
-+        PrintStream emptyStream = new PrintStream(new OutputStream() {
-+            @Override
-+            public void write(int b) { }
-+        });
-+
-+        System.err.flush();
-+        System.setErr(emptyStream);
-+
-+        boolean retVal;
-+        try {
-+            prefs.put("papermc.priv_test", "This is a test performed by the Paper Minecraft server software."); // SecurityException
-+            prefs.remove("papermc.priv_test");
-+            prefs.flush(); // BackingStoreException
-+            retVal = true;
-+        } catch (Exception ignored) { // Windows = SecurityException, Linux = BackingStoreException
-+            retVal = false;
-+        }
-+        runningAsRootOrAdmin = retVal;
-+
-+        System.err.flush();
-+        System.setErr(err);
-+    }
-+
-+    public static boolean userIsRootOrAdmin() { return runningAsRootOrAdmin; }
-+}
-diff --git a/src/main/java/org/bukkit/craftbukkit/Main.java b/src/main/java/org/bukkit/craftbukkit/Main.java
-index af05f3c1e..2a0273074 100644
---- a/src/main/java/org/bukkit/craftbukkit/Main.java
-+++ b/src/main/java/org/bukkit/craftbukkit/Main.java
-@@ -1,5 +1,6 @@
- package org.bukkit.craftbukkit;
- 
-+import com.destroystokyo.paper.util.ServerEnvironment; // Paper
- import java.io.File;
- import java.io.IOException;
- import java.text.SimpleDateFormat;
-@@ -212,6 +213,17 @@ public class Main {
-                     System.setProperty(TerminalConsoleAppender.JLINE_OVERRIDE_PROPERTY, "false"); // Paper
-                 }
- 
-+                // Paper start - detect running as root
-+                if (ServerEnvironment.userIsRootOrAdmin()) {
-+                    System.err.println("****************************");
-+                    System.err.println("YOU ARE RUNNING AS AN ADMINISTRATIVE OR ROOT USER. THIS IS NOT ADVISED.");
-+                    System.err.println("YOU ARE OPENING YOURSELF UP TO POTENTIAL RISKS WHEN DOING THIS.");
-+                    System.err.println("MALWARE, BAD PLUGINS, AND ATTACKERS WILL HAVE COMPLETE ACCESS AND CONTROL OF YOUR MACHINE.");
-+                    System.err.println("****************************");
-+                    System.err.println();
-+                }
-+                // Paper end
-+
-                 if (Main.class.getPackage().getImplementationVendor() != null && System.getProperty("IReallyKnowWhatIAmDoingISwear") == null) {
-                     Date buildDate = new SimpleDateFormat("yyyyMMdd-HHmm").parse(Main.class.getPackage().getImplementationVendor());
- 
--- 
-2.25.0
-