Refactor `Feature`

Make events functions `OnEnabled()` and `OnEnabled()`
protected rather than public.

Move initialization and clean up logic into
`OnCreated()` and `OnDestroyed()` event functions.

sources/Features/FixAmmoSelling/FixAmmoSelling.uc

@@ -133,7 +133,7 @@ struct WeaponRecord
 //  All weapons we've detected so far.
 var private array<WeaponRecord> registeredWeapons; 
 
-public function OnEnabled()
+protected function OnEnabled()
 {
     local KFWeapon      nextWeapon;
     local KFAmmoPickup  nextPickup;
@@ -149,7 +149,7 @@ public function OnEnabled()
     }
 }
 
-public function OnDisabled()
+protected function OnDisabled()
 {
     local int                       i;
     local AmmoPickupStalker         nextStalker;

sources/Features/FixDoshSpam/FixDoshSpam.uc

@@ -89,7 +89,7 @@ var private array<DoshStreamPerPlayer> currentContributors;
 //  Wads of cash that are lying around on the map.
 var private array<CashPickup> wads;
 
-public function OnEnabled()
+protected function OnEnabled()
 {
     local CashPickup nextCash;
     //      Find all wads of cash laying around on the map,
@@ -100,7 +100,7 @@ public function OnEnabled()
     }
 }
 
-public function OnDisabled()
+protected function OnDisabled()
 {
     wads.length                 = 0;
     currentContributors.length  = 0;

sources/Features/FixDualiesCost/FixDualiesCost.uc

@@ -145,7 +145,7 @@ var private const array<WeaponDataRecord> storedValues;
 //  Sell value of the last seen pickup in 'OverridePickupQuery'
 var private int nextSellValue;
 
-public function OnEnabled()
+protected function OnEnabled()
 {
     local KFWeapon nextWeapon;
     //  Find all frags, that spawned when this fix wasn't running.
@@ -156,7 +156,7 @@ public function OnEnabled()
     level.game.AddGameModifier(Spawn(class'DualiesCostRule'));
 }
 
-public function OnDisabled()
+protected function OnDisabled()
 {
     local GameRules         rulesIter;
     local DualiesCostRule   ruleToDestroy;

sources/Features/FixFFHack/FixFFHack.uc

@@ -56,12 +56,12 @@ var private config const array< class<DamageType> > alwaysScale;
 //  Damage types, for which we should never reapply friendly fire scaling.
 var private config const array< class<DamageType> > neverScale;
 
-public function OnEnabled()
+protected function OnEnabled()
 {
     level.game.AddGameModifier(Spawn(class'FFHackRule'));
 }
 
-public function OnDisabled()
+protected function OnDisabled()
 {
     local GameRules     rulesIter;
     local FFHackRule    ruleToDestroy;

sources/Features/FixInfiniteNades/FixInfiniteNades.uc

@@ -58,7 +58,7 @@ struct FragAmmoRecord
 };
 var private array<FragAmmoRecord> ammoRecords;
 
-public function OnEnabled()
+protected function OnEnabled()
 {
     local Frag nextFrag;
     //  Find all frags, that spawned when this fix wasn't running.
@@ -69,7 +69,7 @@ public function OnEnabled()
     RecreateFrags();
 }
 
-public function OnDisabled()
+protected function OnDisabled()
 {
     RecreateFrags();
     ammoRecords.length = 0;

sources/Features/FixInventoryAbuse/FixInventoryAbuse.uc

@@ -44,7 +44,7 @@ struct DualiesPair
 //  It's made configurable in case of custom dual weapons.
 var private config const array<DualiesPair> dualiesClasses;
 
-public function OnEnabled()
+protected function OnEnabled()
 {
     local float actualInterval;
     actualInterval = checkInterval;
@@ -55,7 +55,7 @@ public function OnEnabled()
     SetTimer(actualInterval, true);
 }
 
-public function OnDisabled()
+protected function OnDisabled()
 {
     SetTimer(0.0f, false);
 }

sources/Features/FixZedTimeLags/FixZedTimeLags.uc

@@ -65,7 +65,7 @@ var private float updateCooldown;
 //  Recorded game type, to avoid constant conversions every tick
 var private KFGameType gameType;
 
-public function OnEnabled()
+protected function OnEnabled()
 {
     gameType = KFGameType(level.game);
     if (gameType == none)
@@ -78,7 +78,7 @@ public function OnEnabled()
     }
 }
 
-public function OnDisabled()
+protected function OnDisabled()
 {
     gameType = KFGameType(level.game);
     if (gameType != none && disableTick)