[Server] Rework Get/SetAttributeCurrent into Get/SetAttributeModifier

As seen here, attributes don't use the concept of current values, but rather of value modifiers and value damage:

https://github.com/OpenMW/openmw/blob/master/apps/openmw/mwmechanics/stat.cpp#L217

apps/openmw-mp/Script/Functions/Stats.cpp

@@ -217,7 +217,7 @@ int StatsFunctions::GetAttributeBase(unsigned short pid, unsigned short attribut
     return player->creatureStats.mAttributes[attribute].mBase;
 }
 
-int StatsFunctions::GetAttributeCurrent(unsigned short pid, unsigned short attribute) noexcept
+int StatsFunctions::GetAttributeModifier(unsigned short pid, unsigned short attribute) noexcept
 {
     Player *player;
     GET_PLAYER(pid, player, 0);
@@ -225,7 +225,7 @@ int StatsFunctions::GetAttributeCurrent(unsigned short pid, unsigned short attri
     if (attribute >= Attribute::Length)
         return 0;
 
-    return player->creatureStats.mAttributes[attribute].mCurrent;
+    return player->creatureStats.mAttributes[attribute].mMod;
 }
 
 int StatsFunctions::GetSkillBase(unsigned short pid, unsigned short skill) noexcept
@@ -431,7 +431,7 @@ void StatsFunctions::SetAttributeBase(unsigned short pid, unsigned short attribu
     player->creatureStats.mAttributes[attribute].mBase = value;
 }
 
-void StatsFunctions::SetAttributeCurrent(unsigned short pid, unsigned short attribute, int value) noexcept
+void StatsFunctions::SetAttributeModifier(unsigned short pid, unsigned short attribute, int value) noexcept
 {
     Player *player;
     GET_PLAYER(pid, player,);
@@ -439,7 +439,7 @@ void StatsFunctions::SetAttributeCurrent(unsigned short pid, unsigned short attr
     if (attribute >= Attribute::Length)
         return;
 
-    player->creatureStats.mAttributes[attribute].mCurrent = value;
+    player->creatureStats.mAttributes[attribute].mMod = value;
 }
 
 void StatsFunctions::SetSkillBase(unsigned short pid, unsigned short skill, int value) noexcept  //TODO: need packet for one value

apps/openmw-mp/Script/Functions/Stats.hpp

@@ -36,7 +36,7 @@
     {"GetFatigueCurrent",       StatsFunctions::GetFatigueCurrent},\
     \
     {"GetAttributeBase",        StatsFunctions::GetAttributeBase},\
-    {"GetAttributeCurrent",     StatsFunctions::GetAttributeCurrent},\
+    {"GetAttributeModifier",    StatsFunctions::GetAttributeModifier},\
     \
     {"GetSkillBase",            StatsFunctions::GetSkillBase},\
     {"GetSkillCurrent",         StatsFunctions::GetSkillCurrent},\
@@ -64,7 +64,7 @@
     {"SetFatigueCurrent",       StatsFunctions::SetFatigueCurrent},\
     \
     {"SetAttributeBase",        StatsFunctions::SetAttributeBase},\
-    {"SetAttributeCurrent",     StatsFunctions::SetAttributeCurrent},\
+    {"SetAttributeModifier",    StatsFunctions::SetAttributeModifier},\
     \
     {"SetSkillBase",            StatsFunctions::SetSkillBase},\
     {"SetSkillCurrent",         StatsFunctions::SetSkillCurrent},\
@@ -113,7 +113,7 @@ public:
     static double GetFatigueCurrent(unsigned short pid) noexcept;
 
     static int GetAttributeBase(unsigned short pid, unsigned short attribute) noexcept;
-    static int GetAttributeCurrent(unsigned short pid, unsigned short attribute) noexcept;
+    static int GetAttributeModifier(unsigned short pid, unsigned short attribute) noexcept;
 
     static int GetSkillBase(unsigned short pid, unsigned short skill) noexcept;
     static int GetSkillCurrent(unsigned short pid, unsigned short skill) noexcept;
@@ -141,7 +141,7 @@ public:
     static void SetFatigueCurrent(unsigned short pid, double value) noexcept;
 
     static void SetAttributeBase(unsigned short pid, unsigned short attribute, int value) noexcept;
-    static void SetAttributeCurrent(unsigned short pid, unsigned short attribute, int value) noexcept;
+    static void SetAttributeModifier(unsigned short pid, unsigned short attribute, int value) noexcept;
 
     static void SetSkillBase(unsigned short pid, unsigned short skill, int value) noexcept;    
     static void SetSkillCurrent(unsigned short pid, unsigned short skill, int value) noexcept;