New macros AI_SAVE_GOLD and AI_SAVE_GOLD_DEFAULT

… to make enabling gold saving for the AI simpler in a scenario now
that it is not the default any more.

changelog

@@ -1,6 +1,8 @@
 Version 1.11.8+dev:
  * AI:
    * RCA (default) AI: Gold saving is turned off by default again
+   * New macros AI_SAVE_GOLD and AI_SAVE_GOLD_DEFAULT for easy enabling of
+     recruitment gold saving in specific scenarios
    * Wolves Micro AI: new optional parameter attack_only_prey=
  * Campaigns:
    * Heir to the Throne:

data/core/macros/ai.cfg

@@ -417,6 +417,33 @@
     [/facet]
 #enddef
 
+#define AI_SAVE_GOLD ACTIVE BEGIN END
+    # Enable AI recruitment gold saving.
+    # ACTIVE: turn from which on gold saving will be active
+    # BEGIN: begin gold saving when unit cost ratio rises above this value
+    # END: end gold saving when unit cost ratio drops below this value
+    # This goes directly into the [ai] tag.
+
+    [aspect]
+        id=recruitment_save_gold
+        [facet]
+            [value]
+                active={ACTIVE}
+                begin={BEGIN}
+                end={END}
+            [/value]
+        [/facet]
+    [/aspect]
+#enddef
+
+#define AI_SAVE_GOLD_DEFAULT
+    # Enable AI recruitment gold saving with values set
+    # to what was the default in Wesnoth 1.11.7 and 1.11.8.
+    # This goes directly into the [ai] tag.
+
+    {AI_SAVE_GOLD 2 1.5 1.1}
+#enddef
+
 ############################################################
 # NEW FORMULA_AI RECRUITMENT BY Dragonking (experimental!)
 ############################################################