Removed restriction not to be able use non regular files.

extra/my_print_defaults.c

@@ -143,6 +143,7 @@ int main(int argc, char **argv)
       if (error == 1)
 	fprintf(stderr, "WARNING: Defaults file '%s' not found!\n",
 		config_file);
+      /* This error is not available now. For the future */
       if (error == 2)
 	fprintf(stderr, "WARNING: Defaults file '%s' is not a regular file!\n",
 		config_file);

mysys/default.c

@@ -320,8 +320,6 @@ static int search_default_file(DYNAMIC_ARRAY *args, MEM_ROOT *alloc,
               name);
       return 0;
     }
-    else if ((stat_info.st_mode & S_IFMT) != S_IFREG)
-      return 2;
   }
 #endif
   if (!(fp = my_fopen(fn_format(name,name,"","",4),O_RDONLY,MYF(0))))