aggregator: hide the aggregator node in readdir

Skip the aggregator file from the fuse_readdir() output.
The file will not be discoverable by grep -r, find, glob etc.
thus preventing confusion from duplicated contents from
the aggregator and from normal stats.

Direct aggregator file access by name will still work.

Issue: LBM1-15406

Signed-off-by: Anton Eidelman <anton@lightbitslabs.com>

Author: anton-lb

src/procstat.c

@@ -380,6 +380,8 @@ static void fuse_readdir(fuse_req_t req, fuse_ino_t ino, size_t size, off_t off,
 
 		if (!item_registered(iter))
 			continue;
+		if (iter->flags & STATS_ENTRY_FLAG_AGGREGATOR)
+			continue;
 		memset(&stat, 0, sizeof(stat));
 		fname = procstat_item_name(iter);
 		fill_item_stats(context, iter, &stat);