Merge "Updated quality_of_service devref doc to reflect reality" into feature/qos

diff --cc doc/source/devref/quality_of_service.rst
index 9dd014368a5e8ff3c5a874a9438fd2263a96f135,023eb42f6ea53bbc48a530ce50177352959789ab..9a2062814fa3ea5ac1d0bc64bd80329bb6e7b260
--- 1/doc/source/devref/quality_of_service.rst
--- 2/doc/source/devref/quality_of_service.rst
+++ b/doc/source/devref/quality_of_service.rst
@@@ -45,16 -64,11 +64,16 @@@ list defined on the class
  For Ml2 plugin, the list of supported QoS rule types is defined as a common
  subset of rules supported by all active mechanism drivers.
  
 +Note: the list of supported rule types reported by core plugin is not enforced
 +when accessing QoS rule resources. This is mostly because then we would not be
 +able to create any rules while at least one ml2 driver in gate lacks support
 +for QoS (at the moment of writing, linuxbridge is such a driver).
 +
  
- QoS resources
- -------------
+ Database models
+ ---------------
  
- QoS design defines the following two conceptual resources to define QoS rules
+ QoS design defines the following two conceptual resources to apply QoS rules
  for a port or a network:
  
  * QoS policy