The ornamental design for a headacherack, as shown and described.
FIG. 1 is a perspective view of the present design connected to a vehicle.
FIG. 2 is a perspective view of the present design;
FIG. 3 is a front elevational view of FIG. 2.
FIG. 4 is a rear elevational view of FIG. 2.
FIG. 5 is a top plan view of FIG. 2.
FIG. 6 is a bottom plan view of FIG. 2.
FIG. 7 is a right side elevational view of FIG. 2, with the left side view being a mirror image thereof; and,
FIG. 8 is a perspective view of the present design connected to a vehicle with vehicle components.
The broken lines showing of the truck, light bar and cargo box in FIGS. 1 and 8 illustrates the environment of the claimed design and forms no part thereof. The remaining broken lines in the drawings illustrate portions of the headache rack and form no part of the claimed design.