Update choices.py to add C39 Type outlets

(cherry picked from commit e92d0ec2e642b00506a64c1333e95cea8a36feae)

netbox/dcim/choices.py

@@ -684,6 +684,7 @@ class PowerOutletTypeChoices(ChoiceSet):
     # Direct current (DC)
     TYPE_DC = 'dc-terminal'
     # Proprietary
+    TYPE_EATON_C39 = 'eaton-c39'
     TYPE_HDOT_CX = 'hdot-cx'
     TYPE_SAF_D_GRID = 'saf-d-grid'
     TYPE_NEUTRIK_POWERCON_20A = 'neutrik-powercon-20a'
@@ -805,6 +806,7 @@ class PowerOutletTypeChoices(ChoiceSet):
             (TYPE_DC, 'DC Terminal'),
         )),
         (_('Proprietary'), (
+            (TYPE_EATON_C39, 'Eaton C39'),
             (TYPE_HDOT_CX, 'HDOT Cx'),
             (TYPE_SAF_D_GRID, 'Saf-D-Grid'),
             (TYPE_NEUTRIK_POWERCON_20A, 'Neutrik powerCON (20A)'),