New option -read_mkisofsrc interprets .mkisofsrc

libisoburn/trunk/xorriso/xorriso_private.h

@@ -80,6 +80,9 @@ struct XorrisO { /* the global context of xorriso */
  char rc_filenames[Xorriso_rc_nuM][SfileadrL];
  int rc_filename_count;
 
+ /* Whether .mkisofsrc has already been read */
+ int mkisofsrc_done;
+
  char wdi[SfileadrL];
  char wdx[SfileadrL];
  int did_something_useful;