- Requires: iso-codes for basic filesystem in build subpackage
    - add scl_require_package() macro to depend on a particular package
      from the collection
    - fix filesystem file list
    - tighten runtime package dependency via scl_require()
    - fix _localstatedir to point to the correct path according to redhat-rpm-config
    - thanks to Bohuslav Kabrda for feature proposals/QA/fixes