Elaborate on admin warning, now with manual override (resolves #3835)

src/BizHawk.Client.Common/config/Config.cs

@@ -135,6 +135,8 @@ namespace BizHawk.Client.Common
 		public string UpdateIgnoreVersion { get; set; } = "";
 		public bool SkipOutdatedOsCheck { get; set; }
 
+		public bool SkipSuperuserPrivsCheck { get; set; }
+
 		/// <summary>
 		/// Makes a .bak file before any saveram-writing operation (could be extended to make timestamped backups)
 		/// </summary>

src/BizHawk.Client.EmuHawk/Program.cs

@@ -294,15 +294,16 @@ namespace BizHawk.Client.EmuHawk
 				_ = SetDllDirectoryW(dllDir);
 			}
 
-			if (OSTailoredCode.HostWindowsVersion is null ||
-				OSTailoredCode.HostWindowsVersion.Value.Version >= OSTailoredCode.WindowsVersion._10) // "windows isn't capable of being useful for non-administrators until windows 10" --zeromus
+			if (!initialConfig.SkipSuperuserPrivsCheck
+				&& OSTailoredCode.HostWindowsVersion is null or { Version: >= OSTailoredCode.WindowsVersion._10 }) // "windows isn't capable of being useful for non-administrators until windows 10" --zeromus
 			{
 				if (EmuHawkUtil.CLRHostHasElevatedPrivileges)
 				{
 					using MsgBox dialog = new(
 						title: "This EmuHawk is privileged",
 						message: $"EmuHawk detected it {(OSTailoredCode.IsUnixHost ? "is running as root (Superuser)" : "has Administrator privileges")}.\n"
-							+ "This is a bad idea.",
+							+ "Regularly using {(OSTailoredCode.IsUnixHost ? "Superuser" : "Administrator")} for things other than system administration makes it easier to hack you.\n"
+							+ "If you're certain, you may continue anyway (and without support). You'll find a flag \"{nameof(Config.SkipSuperuserPrivsCheck)}\" in the config file, which disables this warning.",
 						boxIcon: MessageBoxIcon.Warning);
 					dialog.ShowDialog();
 				}