* core
 - enabled by default
 - mirrors must mirror this media to be listed as a mirror
 - only free/libre stuff as described by FSF / OSI
 - must be selfcontained

* nonfree
 - disabled by default, installer will ask to enable it if
   it detects hw that need driver/fw from here
 - mirrors must mirror this media to be listed as a mirror
 - contains apps/drivers/firmware that are free to redistribute
   but we dont have redistributable source for
 - for example: ati/nvidia drivers/firmware, Oracle Java,
   Adobe stuff we might get redistribution permission for

* tainted
 - disabled by default
 - mirrors are free to not mirror this media ( ? )
 - stuff we think we can redistribute, but that may have some
   patent issues or other legal restrictions
 - what belongs / is allowed here must still be discussed

* debug_core
 - disabled by default
 - debug rpms for core

* debug_nonfree
 - disabled by default
 - debug rpms for nonfree

* debug_tainted
 - disabled by default
 - debug rpms for tainted



Every media contains the same layout:

* backports
 - disabled by default

* backports_testing
 - disabled by default

* release
 - disabled by default on nonfree, installer will ask to enable
   it if it detects hw that need driver/fw from here
 - disabled by default on tainted, debug_core, debug_nonfree,
   debug_tainted

* updates
 - disabled by default on nonfree, installer will ask to enable
   it if it detects hw that need driver/fw from here
 - disabled by default on tainted, debug_core, debug_nonfree,
   debug_tainted

* updates_testing
 - disabled by default