Added compile-time checks for thread locals with -no-crt

Now using any thread-local variables with -no-crt enabled
will cause a compiler error, unless -no-thread-local is
given.

Also fixed a minor typo in a comment.

src/main.cpp

@@ -2334,6 +2334,10 @@ gb_internal void print_show_help(String const arg0, String command, String optio
 			print_usage_line(2, "Sets the default allocator to be the nil_allocator, an allocator which does nothing.");
 		}
 
+		if (print_flag("-default-to-panic-allocator")) {
+			print_usage_line(2, "Sets the default allocator to be the panic_allocator, an allocator which calls panic() on any allocation attempt.");
+		}
+
 		if (print_flag("-define:<name>=<value>")) {
 			print_usage_line(2, "Defines a scalar boolean, integer or string as global constant.");
 			print_usage_line(2, "Example: -define:SPAM=123");