The ornamental design for a handleset, as shown and described.
FIG. 1 is a front perspective view of a handleset showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a right side view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a top plan view thereof; and,
FIG. 6 is a bottom plan view thereof.
The broken line showing of the interior well surfaces of the handleset, including the unshaded region immediately adjacent the circular edge, is for environmental purposes only and forms no part of the claimed design.