Broken: Blender 2.79rc2 (with Unity 2018.1.0b13)
Short description of error
So basically, in Blender, when I parent an object to a bone, it's origin is the tail of that bone.
But in Unity (when exporting to DAE, using the .blend itself in Unity results in an offset from the tail as well) it's the head of the bone. I'm not sure if this is intended or if this is a bug, and if it's a bug, whether it's on Blender's or Unity's side.
Exact steps for others to reproduce the error
Sample .blend file: