Implement Raid MOTD for UF

Don't forget to source 2014_10_11_RaidMOTD.sql

SoD and RoF implementations still to come

common/eq_packet_structs.h

@@ -3929,6 +3929,10 @@ struct RaidAddMember_Struct {
 /*139*/	uint8 flags[5]; //no idea if these are needed...
 };
 
+struct RaidMOTD_Struct {
+/*000*/ RaidGeneral_Struct general; // leader_name and action only used
+/*136*/ char motd[0]; // max size is 1024, but reply is variable
+};
 
 struct RaidAdd_Struct {
 /*000*/	uint32		action;	//=0