Implemented SPA 481, 485,486,512

Implemented

SE_Fc_Cast_Spell_On_Land 481
Focus effect that is checked when a spell is cast on a target, if target has this focus effect and all limiting criteria are met, then the target will cast a spell as specified by the focus. Can be given a roll chance for success. Base1=Chance, Base2=Spellid

Note: This spell has a huge amount of potential applications. See 'Alliance' type spells on live. (ie live spell 50247)

Implemented associated focus limits seen in live spells.

SE_Ff_CasterClass	485
- Caster of spell on target with a focus effect that is checked by incoming spells must be specified class or classes.

SE_Ff_Same_Caster	 486 -Caster of spell on target with a focus effect that is checked by incoming spells 0=Must be different caster 1=Must be same caster

The following is an associated effect seen with SPA 481

SE_Proc_Timer_Modifier 			512
This provides a way to rate limit the amount of spell triggers generated by SPA 481. For example after 1 successful spell trigger no additional spells can be triggered for 1.5 seconds. Ie. Base=1 and Base2 1500.
Written in a flexible format to allow scaling of multiple different buffs with this effect at same time.

zone/zonedb.cpp

@@ -3666,6 +3666,8 @@ void ZoneDatabase::LoadBuffs(Client *client)
 		buffs[slot_id].caston_z = caston_z;
 		buffs[slot_id].ExtraDIChance = ExtraDIChance;
 		buffs[slot_id].RootBreakChance = 0;
+		buffs[slot_id].focusproclimit_time = 0;
+		buffs[slot_id].focusproclimit_procamt = 0;
 		buffs[slot_id].UpdateClient = false;
 		buffs[slot_id].instrument_mod = instrument_mod;
 	}