Merge branch 'master' into jgrpp

# Conflicts:
#	.github/workflows/ci-build.yml
#	.github/workflows/commit-checker.yml
#	src/command.cpp
#	src/company_cmd.cpp
#	src/company_gui.cpp
#	src/crashlog.cpp
#	src/economy.cpp
#	src/lang/english.txt
#	src/lang/german.txt
#	src/lang/korean.txt
#	src/misc_gui.cpp
#	src/newgrf_config.cpp
#	src/openttd.cpp
#	src/settings_gui.cpp
#	src/ship_cmd.cpp
#	src/table/settings/gui_settings.ini

src/newgrf_config.cpp

@@ -665,6 +665,10 @@ compatible_grf:
 	return res;
 }
 
+
+/** Set this flag to prevent any NewGRF scanning from being done. */
+int _skip_all_newgrf_scanning = 0;
+
 /** Helper for scanning for files with GRF as extension */
 class GRFFileScanner : FileScanner {
 	std::chrono::steady_clock::time_point next_update; ///< The next moment we do update the screen.
@@ -682,6 +686,11 @@ public:
 	/** Do the scan for GRFs. */
 	static uint DoScan()
 	{
+		if (_skip_all_newgrf_scanning > 0) {
+			if (_skip_all_newgrf_scanning == 1) _skip_all_newgrf_scanning = 0;
+			return 0;
+		}
+
 		CalcGRFMD5ThreadingStart();
 		GRFFileScanner fs;
 		fs.grfs.clear();