The ornamental design for a holeplug, as shown and described.
The patent or application contains at least one drawing executed in color. Copies of this patent or application publication with color drawing(s) will be provided by the Office upon request and payment of the necessary fee.
FIG. 1 is a front view of the hole plug according to the present invention;
FIG. 2 is a top view of the hole plug of FIG. 1;
FIG. 3 is a bottom view of the hole plug of FIG. 1; and,