MIGRATE count of cached sockets in INFO output.

src/redis.c

@@ -2082,7 +2082,8 @@ sds genRedisInfoString(char *section) {
             "keyspace_misses:%lld\r\n"
             "pubsub_channels:%ld\r\n"
             "pubsub_patterns:%lu\r\n"
-            "latest_fork_usec:%lld\r\n",
+            "latest_fork_usec:%lld\r\n"
+            "migrate_cached_sockets:%ld\r\n",
             server.stat_numconnections,
             server.stat_numcommands,
             getOperationsPerSecond(),
@@ -2093,7 +2094,8 @@ sds genRedisInfoString(char *section) {
             server.stat_keyspace_misses,
             dictSize(server.pubsub_channels),
             listLength(server.pubsub_patterns),
-            server.stat_fork_time);
+            server.stat_fork_time,
+            dictSize(server.migrate_cached_sockets));
     }
 
     /* Replication */