- a handful of modules had an unused *requires* key in module.desc;
this is probably from previous intentions around
prerequisites-testing. Since the settings were empty anyway,
they have been removed.
- [unpackfs] Compacted the way *requiredModules* list is written
- The mount module must happen before unpackfs because that (mount)
module sets up the root mount point (in /tmp) and some other
variables needed later.
