log stats of incoming piece requests

parse_session_stats.py

@@ -134,6 +134,7 @@ reports = [
 	('peers_list_size', 'num', '', 'number of known peers (not necessarily connected)', ['num list peers']),
 	('overall_rates', 'rate', 'B/s', 'download and upload rates', ['uploaded bytes', 'downloaded bytes', 'upload rate', 'download rate', 'smooth upload rate', 'smooth download rate']),
 	('disk_write_queue', 'Bytes', 'B', 'bytes queued up by peers, to be written to disk', ['disk write queued bytes', 'disk queue limit', 'disk queue low watermark']),
+	('peers_requests', 'num', '', 'incoming piece request rate', ['piece requests', 'piece rejects', 'max piece requests', 'invalid piece requests', 'choked piece requests', 'cancelled piece requests']),
 	('peers_upload', 'num', '', 'number of peers by state wrt. uploading', ['peers up interested', 'peers up unchoked', 'peers up requests', 'peers disk-up', 'peers bw-up', 'max unchoked']),
 	('peers_download', 'num', '', 'number of peers by state wrt. downloading', ['peers down interesting', 'peers down unchoked', 'peers down requests', 'peers disk-down', 'peers bw-down','num end-game peers']),
 	('peer_errors', 'num', '', 'number of peers by error that disconnected them', ['error peers', 'peer disconnects', 'peers eof', 'peers connection reset', 'connect timeouts', 'uninteresting peers disconnect', 'banned for hash failure', 'no memory peer errors', 'too many peers', 'transport timeout peers', 'connection refused peers', 'connection aborted peers', 'permission denied peers', 'no buffer peers', 'host unreachable peers', 'broken pipe peers', 'address in use peers', 'access denied peers', 'invalid argument peers', 'operation aborted peers']),