Food : Sagefishes not restore health

Happens across all cores.

The 2 spells of health and mana restoration are triggerred by 2 spelleffects. Evidently, the later overrides the former one, this way restoring HP aura gets dropped. The false positive check of aura inconsistency is traced to be in

SpellMgr::IsNoStackSpellDueToSpell(

The closest TC equivalent is Aura::CanStackWith(. The lot of exclusions is moved there to the DB (spell_group mechanic), and we find that the Mangos check

    // more generic checks
    if (spellInfo_1->SpellIconID == spellInfo_2->SpellIconID &&
        spellInfo_1->SpellIconID != 0 && spellInfo_2->SpellIconID != 0)

is far outdated and too restrictive. Not that I have an idea of a correct fix beyond porting the whole TC mechanic. However it would be simple to add an exception above (the both SPELLFAMILY_GENERIC and either SpellIconID=1778 or for 2 sets of restoration auras) with the later solution looking a bit cleaner.