The ornamental design for a socket, as shown and described.
FIG. 1 is a front view of the socket, showing my new design;
FIG. 2 is a back view thereof;
FIG. 3 is a top view thereof;
FIG. 4 is a bottom view thereof;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a right side elevational view thereof;
FIG. 7 is a front perspective view thereof; and,
FIG. 8 is a back perspective view thereof.
The broken lines in the drawings are for the purposes of illustrating portions of the socket that form no part of the claimed design.
The masked areas adjacent to the broken lines in FIGS. 2 and 8 form no part of the claimed design. The dash-dot broken lines define the bounds of the claimed design and form no part thereof.