This fixes bug https://project.nexedi.net/#/bug_module/20210603-1C66F4F

See merge request nexedi/slapos.core!509

   This script isnt used at all

See merge request nexedi/slapos.core!504

   Strict returns directly a single Software Release for a giving url.

   This fast input option aims to allow certain sites, request "related" slaves
   from an Instance Tree.

   The script  InstanceTree_getFastInputDict is used to custom the feature to
   specific software releases, since depends which one is used, and it cannot
   be generalized for now.

See merge request nexedi/slapos.core!505

See merge request nexedi/slapos.core!506

See merge request nexedi/slapos.core!508

See merge request nexedi/slapos.core!507

   In this way, the debug becomes easier to be notified.

See merge request !502

The bug was introduced in 57118615 and
was actually removing the main IPv6 of the machine because the
_addSystemAddress function is actually seeing the "tentative" attribute
for the IPv6 address added at boot time.

Instead of forcing prefix to /128 for tap IPv6, use noprefixroute
to avoid the unwanted automatic routing.

The logic was here, but the argument was not registered

       Use the proper way to include Mixin into a portal type

  This value isnt exported anymore

See merge request !501

   A script was missing and one was accepting wrong parameter