Oct 22 (Reuters) - A 16-week jail term handed out to a Leeds United fan on Monday for attacking former England goalkeeper Chris Kirkland in a match against Sheffield Wednesday was too lenient, the Championship (second tier) club said. Aaron Cawley, 21, from Cheltenham, pleaded guilty at Sheffield Magistrates' Court to assault and invading the pitch during the game at Hillsborough on Friday. Wednesday keeper Kirkland was pushed in the face by Cawley and shoved to the ground moments after conceding an equaliser in the 76th minute. ... More...