[C2][L2Server]Add additional set skill effect to set definition

[Zconll]

Default C1 set definition:

set_begin   56  slot_chest=6373 slot_legs=6374  slot_head=6378  slot_gloves=6375    slot_feet=6376  slot_lhand=6377 slot_additional=[slot_lhand]    set_skill=[s_imperial_crusader_armor]   p_def_inc={0;0} m_def_inc={0;0} hp_inc={0;0}    mp_inc={0;0}    move_speed_inc={0;0}    breath_inc={0;0}    magic_resist_inc={0;0}  casting_speed_inc={0;0} p_attack_inc={0;0}  m_attack_inc={0;0}  hp_regen_inc={0;0}  mp_regen_inc={0;0}  str_inc={2;0}   con_inc={0;0}   dex_inc={-2;0}  int_inc={0;0}   men_inc={0;0}   wit_inc={0;0}   avoid_inc={0;0} shield_def_prob_inc={0;0}   weight_limit_inc={0;0}  resist_poison_inc={0;-80}   p_def_vs_dagger_inc={0;0}   set_end

We can have one additional set skill effect as in c4+, so we can add some effect when we have additional slot used (shield), it fixed effect set for c3+ armors sets with shield equiped.

set_begin   56  slot_chest=6373 slot_legs=6374  slot_head=6378  slot_gloves=6375    slot_feet=6376  slot_lhand=6377 slot_additional=[slot_lhand]    set_skill=[s_set_collected] set_effect_skill=[s_imperial_crusader_armor]    set_additional_effect_skill=[s_imperial_crusader_armor_shield]  str_inc={2;0}   con_inc={0;0}   dex_inc={-2;0}  int_inc={0;0}   men_inc={0;0}   wit_inc={0;0}   set_end

[Master Toma]

fixed in c2