Weaker Day Zombie

This little mod makes undead unable to move during day, but if you attack an undead, he will be able to attack you like if you awaken him. It can handle natural spawning, spawner spawning and egg spawning. All the effect are removed when night came. Now with the /wdztoggle command, wich toggle if zombie are frozen during day, or if zombie are slowed during day (effect slowness 3)