Edit Scepter of Fire difficulty (#5524)

* Edit SoF difficulty

apply patches from https://github.com/cooljeanius/wesnoth_mods/tree/master/campaigns/Sceptre_Of_Fire

data/campaigns/Sceptre_of_Fire/scenarios/6_Towards_the_Caves.cfg

@@ -2,7 +2,7 @@
 [scenario]
     name= _ "Towards the Caves"
     id=6_Towards_the_Caves
-    turns=12
+    {TURNS 20 16 12}
     map_file=6_Towards_the_Caves.map
     next_scenario=7_Outriding_the_Outriders
 
@@ -17,7 +17,7 @@
         canrecruit=yes
         controller=human
         recruit=Dwarvish Fighter,Dwarvish Thunderer,Dwarvish Guardsman,Dwarvish Scout,Gryphon Rider
-        gold=200
+        {GOLD 300 250 200}
         team_name=dwarves
         user_team_name= _ "Dwarves"
         {FLAG_VARIANT knalgan}
@@ -47,7 +47,7 @@
         [/modifications]
         canrecruit=yes
         recruit=Elvish Rider,Elvish Hero,Elvish Marksman,Elvish Ranger,Elvish Druid
-        {GOLD 300 350 400}
+        {GOLD 250 325 400}
         team_name=elves
         user_team_name= _ "Elves"
         [ai]
@@ -84,7 +84,7 @@
         {FLAG_VARIANT wood-elvish}
     [/side]
 
-    {STARTING_VILLAGES 2 12}
+    {STARTING_VILLAGES 2 {ON_DIFFICULTY 8 10 12}}
 
     [side]
         type=Elvish Marshal
@@ -94,7 +94,7 @@
         canrecruit=yes
         recruit=Elvish Rider,Elvish Hero,Elvish Marksman,Elvish Ranger,Elvish Druid
 
-        {GOLD 225 275 325}
+        {GOLD 200 260 320}
         team_name=elves
         user_team_name= _ "Elves"
         [ai]
@@ -103,15 +103,15 @@
                 [criteria]
                     x,y=36,3
                 [/criteria]
-                value=100
-                protect_radius=10
+                {QUANTITY value 60 80 100}
+                {QUANTITY protect_radius 8 9 10}
             [/goal]
             [goal]
                 name=target
                 [criteria]
                     race=dwarf
                 [/criteria]
-                value=10
+                {QUANTITY value 8 9 10}
             [/goal]
             [avoid]
                 x=1-18
@@ -121,8 +121,8 @@
         {FLAG_VARIANT wood-elvish}
     [/side]
 
-    {STARTING_VILLAGES 3 8}
-    {STARTING_VILLAGES_AREA 3 34 10 8}
+    {STARTING_VILLAGES 3 {ON_DIFFICULTY 6 7 8}}
+    {STARTING_VILLAGES_AREA 3 34 10 {ON_DIFFICULTY 6 7 8}}
 
     [side]
         type=Elvish Captain
@@ -131,7 +131,7 @@
         side=4
         canrecruit=yes
         recruit=Elvish Scout,Elvish Fighter,Elvish Archer,Elvish Shaman
-        {GOLD 100 150 200}
+        {GOLD 80 140 200}
         team_name=elves
         user_team_name= _ "Elves"
         [ai]
@@ -140,7 +140,7 @@
                 [criteria]
                     id=Alanin
                 [/criteria]
-                value=10
+                {QUANTITY value 6 8 10}
             [/goal]
             [goal]
                 name=target
@@ -153,7 +153,7 @@
         {FLAG_VARIANT wood-elvish}
     [/side]
 
-    {STARTING_VILLAGES 4 11}
+    {STARTING_VILLAGES 4 {ON_DIFFICULTY 9 10 11}}
 
     [story]
         [part]
@@ -483,6 +483,49 @@
             speaker=Thursagan
             message= _ "You going south has more of a chance of success for you than staying here or going back to the mines! And getting news to Haldric of what has happened is also the best way to get help to us."
         [/message]
+#ifdef EASY
+        [message]
+            speaker=Thursagan
+            message= _ "Here, if you are still having doubts, let me inscribe this rune for you to help you slip past their defenses."
+        [/message]
+        [modify_unit]
+            [filter]
+                id=Alanin
+            [/filter]
+            [object]
+                silent=yes
+                duration=forever
+                # (originally I gave him an additional movement point here, too,
+                # but that causes his dialogue in the beginning of the next scenario
+                # "Outriding the Outriders" to be false, so I am removing that now.)
+                [effect]
+                    apply_to=new_ability
+                    [abilities]
+                        {ABILITY_CONCEALMENT}
+                        {ABILITY_SKIRMISHER}
+                    [/abilities]
+                [/effect]
+            [/object]
+        [/modify_unit]
+        [sound]
+            name=mace.wav
+        [/sound]
+        [heal_unit]
+            [filter]
+                id=Alanin
+            [/filter]
+            moves=full
+            restore_attacks=yes
+        [/heal_unit]
+        [message]
+            speaker=Alanin
+            message= _ "Thanks!"
+        [/message]
+        [message]
+            speaker=narrator
+            message= _ "Alanin has gained new abilities!"
+        [/message]
+#endif
         [message]
             speaker=Alanin
             message= _ "I suppose..."
@@ -498,15 +541,15 @@
         name=turn 4
         [gold]
             side=2
-            amount=200
+            {QUANTITY amount 80 140 200}
         [/gold]
         [gold]
             side=3
-            amount=200
+            {QUANTITY amount 80 140 200}
         [/gold]
         [gold]
             side=4
-            amount=200
+            {QUANTITY amount 60 130 200}
         [/gold]
     [/event]