- New background property: <snake_defense> alters snake defense chance

- New sector property: <numsnakes> sets maximum number of snakes per snake attack

git-svn-id: https://ja2svn.mooo.com/source/ja2/trunk/GameSource/ja2_v1.13/Build@8277 3b4a5df2-a311-0410-b5c6-a8a6f20db521

Utils/_EnglishText.cpp

@@ -8944,6 +8944,7 @@ STR16	szBackgroundText_Value[]=
 	L" %s%d%% effectiveness at treating population against diseases\n",
 	L"Can spot tracks up to %d tiles away\n",
 	L" %s%d%% initial distance to enemy in ambush\n",
+	L" %s%d%% chance to evade snake attacks\n",
 
 	L" dislikes some other backgrounds\n",
 	L"Smoker",