Allow relaxe volume and volset id constraints.

libisofs/ecma119.h

@@ -81,6 +81,13 @@ struct iso_write_opts {
      */
     unsigned int allow_full_ascii :1;
     
+    /**
+     * Allow all characters to be part of Volume and Volset identifiers on
+     * the Primary Volume Descriptor. This breaks ISO-9660 contraints, but
+     * should work on modern systems.
+     */
+    unsigned int relaxed_vol_atts :1;
+    
     /**
      * Allow paths in the Joliet tree to have more than 240 characters.
      */
@@ -222,6 +229,8 @@ struct ecma119_image
     unsigned int allow_lowercase :1;
     unsigned int allow_full_ascii :1;
     
+    unsigned int relaxed_vol_atts : 1;
+    
     /** Allow paths on Joliet tree to be larger than 240 bytes */
     unsigned int joliet_longer_paths :1;