cleanup dead directory entries. This was a real b#tch, so keep your eye out for issues - which you shouldn't see until next weekend when this is scheduled to run. We're only setting flags, so if anything goes wrong we should be able to recover without too much pain.

boot.php

@@ -383,6 +383,7 @@ define ( 'NOTIFY_SYSTEM',   0x8000 );
 
 define ( 'HUBLOC_FLAGS_PRIMARY',      0x0001);
 define ( 'HUBLOC_FLAGS_UNVERIFIED',   0x0002);
+define ( 'HUBLOC_FLAGS_ORPHANCHECK',  0x0004); 
 define ( 'HUBLOC_FLAGS_DELETED',      0x1000);
 
 define ( 'XCHAN_FLAGS_NORMAL',		  0x0000);