Add force enable fly option

indra/newview/app_settings/settings_alchemy.xml

@@ -266,6 +266,17 @@
       <key>Value</key>
       <integer>0</integer>
     </map>
+    <key>AlchemyForceFly</key>
+    <map>
+      <key>Comment</key>
+      <string>Always allow flight</string>
+      <key>Persist</key>
+      <integer>1</integer>
+      <key>Type</key>
+      <string>Boolean</string>
+      <key>Value</key>
+      <integer>0</integer>
+    </map>
     <key>AlchemyHudTextFadeDistance</key>
     <map>
       <key>Comment</key>

indra/newview/llagent.cpp

@@ -787,6 +787,9 @@ BOOL LLAgent::canFly()
 // [/RLVa:KB]
 	if (isGodlike()) return TRUE;
 
+	static LLCachedControl<bool> alchemy_force_fly(gSavedSettings, "AlchemyForceFly", false);
+	if (alchemy_force_fly) return TRUE;
+
 	LLViewerRegion* regionp = getRegion();
 	if (regionp && regionp->getBlockFly()) return FALSE;
 	

indra/newview/llviewerinput.cpp

@@ -28,6 +28,7 @@
 
 #include "llviewerinput.h"
 
+#include "alcontrolcache.h"
 #include "llappviewer.h"
 #include "llfloaterreg.h"
 #include "llmath.h"
@@ -87,7 +88,7 @@ bool agent_jump( EKeystate s )
 	if( time < FLY_TIME 
 		|| frame_count <= FLY_FRAMES 
 		|| gAgent.upGrabbed()
-		|| !gSavedSettings.getBOOL("AutomaticFly"))
+		|| !ALControlCache::AutomaticFly)
 	{
 		gAgent.moveUp(1);
 	}