Doomsday Engine

Resources|libdoomsday: Updated IWAD identification rules

Identification rules for the following IWADs were added/updated:

- Doom II French version
- Freedoom Phase 1/2 version 0.11.2
- Freedm version 0.11.2
- Heretic Shareware version 1.0
- Heretic Shareware version 1.2
- Heretic Registered version 1.0
- Heretic Registered version 1.2
- Heretic: Shadow of the Serpent Riders version 1.3
- Hexen: Deathkings of the Dark Citadel version 1.0
- Hexen: Deathkings of the Dark Citadel version 1.1