change the default for turn limit to unlimited

changelog

@@ -143,6 +143,8 @@ Version 1.3.6+svn:
      that can get them (undead and mechanical).
    * not_living tag removed from race, as this information is provided
      by the undead and mechanical traits.
+   * the default for turn limit has changed to unlimited, if you have scenarios
+     which rely on the old default of 50 please add a turns parameter to it
  * team color
    * allow color ranges to be defined on-the-fly (like color palettes)
    * now [side] colour=<string> is valid (previously only int)

src/settings.cpp

@@ -33,7 +33,7 @@ int get_turns(const std::string& value)
 		return 100;
 	}
 
-	return lexical_cast_in_range<int>(value, 50, 20, 100);
+	return lexical_cast_in_range<int>(value, 100, 20, 100);
 }
 
 int get_village_gold(const std::string& value)