Display names from Phoenix. Thanks Wolfspirit!

That's quite a piece of work. I have NO idea how Jess can downplay the
effort that went into this.

And it's still not complete, local chat is not affected, perhaps group
chat too.

indra/newview/llstartup.cpp

@@ -205,6 +205,8 @@
 #include "scriptcounter.h"
 // </edit>
 
+#include "llavatarnamecache.h"
+
 // [RLVa:KB]
 #include "rlvhandler.h"
 // [/RLVa:KB]
@@ -2700,6 +2702,13 @@ bool idle_startup()
             LLAppViewer::instance()->loadNameCache();
 		}
 
+		// Start cache in not-running state until we figure out if we have
+		// capabilities for display name lookup
+		LLAvatarNameCache::initClass(false);	
+		S32 phoenix_name_system = gSavedSettings.getS32("PhoenixNameSystem");
+		if(phoenix_name_system <= 0 || phoenix_name_system > 2) LLAvatarNameCache::setUseDisplayNames(false);
+		else LLAvatarNameCache::setUseDisplayNames(true);
+
 		// *Note: this is where gWorldMap used to be initialized.
 
 		// register null callbacks for audio until the audio system is initialized