- Tweaks to spiders to be less robust.

- Made goats/cows not give infinite milk but instead slowly generate milk in their udder for collecting.
- Lowered speak chance for chickens and added a limit for how many chickens can be bred.
- Lowered the chances of an egg to be a chicken hatching egg.
- If you put an egg in your pocket it won't be a chicken hatching egg anymore.
- Chickens won't spawn inside you anymore.
- Added some abstract classes to the list of things that shouldn't spawn with slime cores.
- Increased the time between events.
- Added a spawn spiders button for admins.

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@5535 316c924e-a436-60f5-8080-3fe189b3f50e

code/modules/admin/topic.dm

@@ -1959,6 +1959,11 @@
 				feedback_add_details("admin_secrets_fun_used","ALS")
 				if(aliens_allowed)
 					create_xeno()
+			if("spiders")
+				feedback_inc("admin_secrets_fun_used",1)
+				feedback_add_details("admin_secrets_fun_used","SL")
+				new /datum/event/spider_infestation
+				message_admins("[key_name_admin(usr)] has spawned spiders", 1)
 			if("comms_blackout")
 				feedback_inc("admin_secrets_fun_used",1)
 				feedback_add_details("admin_secrets_fun_used","CB")