Seal/abstract/virtual everything (#6739)

Content.Server/Weapon/Melee/Components/MeleeWeaponComponent.cs

@@ -8,6 +8,7 @@ using Robust.Shared.ViewVariables;
 namespace Content.Server.Weapon.Melee.Components
 {
     [RegisterComponent]
+    [Virtual]
     public class MeleeWeaponComponent : Component
     {
         [ViewVariables(VVAccess.ReadWrite)]

Content.Server/Weapon/Melee/Components/UnarmedCombatComponent.cs

@@ -5,7 +5,7 @@ namespace Content.Server.Weapon.Melee.Components
     // TODO: Remove this, just use MeleeWeapon...
     [RegisterComponent]
     [ComponentReference(typeof(MeleeWeaponComponent))]
-    public class UnarmedCombatComponent : MeleeWeaponComponent
+    public sealed class UnarmedCombatComponent : MeleeWeaponComponent
     {
     }
 }