Redis latency percentiles statistics are not parsed

[fretb]

Use Case

Redis latency stats are not parsed by the redis plugin, this creates problems, e.g. string_as_label metrics in the prometheus output.

# Latencystats
latency_percentiles_usec_zadd:p50=9.023,p99=28.031,p99.9=43.007
latency_percentiles_usec_hgetall:p50=11.007,p99=34.047,p99.9=66.047
latency_percentiles_usec_auth:p50=6.015,p99=24.063,p99.9=43.007
latency_percentiles_usec_ltrim:p50=2.007,p99=4.015,p99.9=4.015
latency_percentiles_usec_lrem:p50=8.031,p99=13.055,p99.9=13.055
latency_percentiles_usec_ttl:p50=2.007,p99=2.007,p99.9=2.007
latency_percentiles_usec_del:p50=5.023,p99=10.047,p99.9=33.023
latency_percentiles_usec_zrem:p50=3.007,p99=14.015,p99.9=17.023
latency_percentiles_usec_expire:p50=3.007,p99=7.007,p99.9=23.039
latency_percentiles_usec_srem:p50=1.003,p99=9.023,p99.9=29.055
latency_percentiles_usec_zrangebyscore:p50=4.015,p99=12.031,p99.9=30.079

Expected behavior

Latency percentile statistics are parsed into their own metrics.

Actual behavior

Latency statistics are not parsed into their own metrics.

Additional info

No response