Port Viewer 2 indra/llvfs

This introduces some API changes, like the new LLDirIterator,
that causes changes elsewhere.

It also include Log Linden's cache changes that aren't in
viewer-development yet that increase the maximum cache size
to ~10 GB.

indra/newview/llappviewerlinux.cpp

@@ -36,6 +36,7 @@
 
 #include "llcommandlineparser.h"
 
+#include "lldiriterator.h"
 #include "llmemtype.h"
 #include "llurldispatcher.h"		// SLURL from other app instance
 #include "llviewernetwork.h"
@@ -741,8 +742,8 @@ std::string LLAppViewerLinux::generateSerialNumber()
 
 	// trawl /dev/disk/by-uuid looking for a good-looking UUID to grab
 	std::string this_name;
-	BOOL wrap = FALSE;
-	while (gDirUtilp->getNextFileInDir(uuiddir, "*", this_name, wrap))
+	LLDirIterator iter(uuiddir, "*");
+	while (iter.next(this_name))
 	{
 		if (this_name.length() > best.length() ||
 		    (this_name.length() == best.length() &&