make kraz quests trigger on random < 40

data/artificial-crew-quests.txt

@@ -7,6 +7,7 @@ mission "plugin-artcrew Kraz [0]"
 	source
 		attribute "rim"
 	to offer
+		random < 40
 		"combat rating" > 5
 		"combat rating" < 100
 		not "plugin-artcrew Kraz quest completed"
@@ -70,6 +71,7 @@ mission "plugin-artcrew Kraz [1]"
 	source
 		attribute "rim"
 	to offer
+		random < 40
 		"combat rating" > 100
 		"combat rating" < 300
 		not "plugin-artcrew Kraz quest completed"
@@ -133,6 +135,7 @@ mission "plugin-artcrew Kraz [2]"
 	source
 		attribute "rim"
 	to offer
+		random < 40
 		"combat rating" > 300
 		not "plugin-artcrew Kraz quest completed"
 	on offer