Can't monitor Memcached

[seederp2p]

It looks like the script works fine, but it fails to populate graph data:

`Application: memcached, app_id=7SNMP['/usr/bin/snmpget' '-v2c' '-c' 'COMMUNITY' '-Oqv' '-m' 'NET-SNMP-EXTEND-MIB' '-M' '/opt/librenms/mibs' 'udp:HOSTNAME:161' 'nsExtendOutputFull.9.109.101.109.99.97.99.104.101.100']
{"data":{"localhost:11211":{"pid":4098489,"uptime":9206,"time":1678404126,"version":"1.5.22","libevent":"2.1.11-stable","pointer_size":64,"rusage_user":3.073049,"rusage_system":2.630094,"max_connections":1024,"curr_connections":1,"total_connections":310,"rejected_connections":309,"connection_structures":3,"reserved_fds":20,"cmd_get":1136,"cmd_set":14,"cmd_flush":0,"cmd_touch":0,"cmd_meta":0,"get_hits":950,"get_misses":186,"get_expired":0,"get_flushed":0,"delete_misses":0,"delete_hits":0,"incr_misses":0,"incr_hits":0,"decr_misses":0,"decr_hits":0,"cas_misses":0,"cas_hits":0,"cas_badval":0,"touch_hits":0,"touch_misses":0,"auth_cmds":0,"auth_errors":0,"bytes_read":164635,"bytes_written":2049789,"limit_maxbytes":2147483648,"accepting_conns":1,"listen_disabled_num":0,"time_in_listen_disabled_us":0,"threads":4,"conn_yields":0,"hash_power_level":16,"hash_bytes":524288,"hash_is_expanding":0,"slab_reassign_rescues":0,"slab_reassign_chunk_rescues":0,"slab_reassign_evictions_nomem":0,"slab_reassign_inline_reclaim":0,"slab_reassign_busy_items":0,"slab_reassign_busy_deletes":0,"slab_reassign_running":0,"slabs_moved":0,"lru_crawler_running":0,"lru_crawler_starts":4335,"lru_maintainer_juggles":49578,"malloc_fails":0,"log_worker_dropped":0,"log_worker_written":0,"log_watcher_skipped":0,"log_watcher_sent":0,"bytes":21268,"curr_items":14,"total_items":14,"slab_global_page_pool":0,"expired_unfetched":0,"evicted_unfetched":0,"evicted_active":0,"evictions":0,"reclaimed":0,"crawler_reclaimed":0,"crawler_items_checked":210,"lrutail_reflocked":1923,"moves_to_cold":620,"moves_to_warm":610,"moves_within_lru":62,"direct_reclaims":0,"lru_bumps_dropped":0}},"error":0,"errorString":"SUCCESS","version":"1.1"}

memcached()RRD[update /opt/librenms/rrd/WWW/app-memcached-7.rrd N:U:U:U:U:U:U:U:U:U:U:U:U:U:U:U:U:U:U] `

===========================================

Component	Version
LibreNMS	23.2.0-22-g1e373dedc (2023-03-09T23:09:53+00:00)
DB Schema	2022_08_15_084507_add_rrd_type_to_wireless_sensors_table (248)
PHP	8.1.2-1ubuntu2.11
Python	3.10.6
Database	MariaDB 10.6.12-MariaDB-0ubuntu0.22.04.1
RRDTool	1.7.2
SNMP	5.9.1
===========================================

[OK] Composer Version: 2.5.4
[OK] Dependencies up-to-date.
[OK] Database connection successful
[OK] Database Schema is current
[OK] SQL Server meets minimum requirements
[OK] lower_case_table_names is enabled
[OK] MySQL engine is optimal
[OK] Database and column collations are correct
[OK] Database schema correct
[OK] MySQl and PHP time match
[OK] Active pollers found
[OK] Dispatcher Service not detected
[OK] Locks are functional
[OK] Python poller wrapper is polling
[OK] Redis is unavailable
[OK] rrd_dir is writable
[OK] rrdtool version ok