#422 RFE: please allow mount to mount multiple directories as a single cd drive

[i30817]

This is useful for cd compression because modern compressors have deduplication, before compressing in degeneral. Obviously in multiple cd games (or scummvm games needing merge/renames like broken sword and discworld 2) deduplication can only happen if the compressor can see the files, which means that they must not be in a iso.

[i30817]

bump. It finally happened that scummvm is supporting a game that needs this to share a single set of data files for both running the dos and scummvm version (versailles 1685, if you're wondering).