v3.0.58+ Dropeventsfilter plugin ignoring Debug flag settings in config file

[michaelhigham]

In versions greater than v3.0.58, the dropeventsfilter plugin is ignoring the debug flag settings in the config file. This is causing the syslog to fill up with INFO and drop-events plugin log entries:

root@solr-stats-prod-02:/tmp# /usr/bin/logagent --config /etc/sematext/logagent.conf
2022-07-12T09:55:20.734Z v3.0.68 pid[19596] add files to plugin list
2022-07-12T09:55:20.737Z v3.0.68 pid[19596] init filter: inputFilter
2022-07-12T09:55:20.737Z v3.0.68 pid[19596] init filter: outputFilter
2022-07-12T09:55:20.738Z v3.0.68 pid[19596] set cfg to debug=false for drop-events
2022-07-12T09:55:20.738Z v3.0.68 pid[19596] load outputFilter: 0 drop-events
2022-07-12T09:55:20.738Z v3.0.68 pid[19596] init plugins
2022-07-12T09:55:20.739Z v3.0.68 pid[19596] ../lib/plugins/input/stdin
2022-07-12T09:55:20.751Z v3.0.68 pid[19596] ../lib/plugins/output/stdout
2022-07-12T09:55:20.756Z v3.0.68 pid[19596] ../lib/plugins/output/elasticsearch.js
2022-07-12T09:55:20.764Z v3.0.68 pid[19596] ../lib/plugins/output/elasticsearch
2022-07-12T09:55:20.764Z v3.0.68 pid[19596] ../lib/plugins/input/files
2022-07-12T09:55:20.809Z v3.0.68 pid[19596] using glob pattern: {/var/solr/logs/solr.log,/var/solr/logs/solr_slow_requests.1log}
2022-07-12T09:55:20.897Z v3.0.68 pid[19596] Logagent report: pid[19596] 403 ms 0 lines parsed. 0 lines/s 0.000 MB/s - empty lines: 0
2022-07-12T09:55:20.897Z v3.0.68 pid[19596] Logagent stats: tokens.used=0 logs.shipped=0 http.failed=0 http.retranstmit=0 parser.throughput.lps=0 parser.throughput.bps=0 parser.lines.parsed=0
2022-07-12T09:55:20.898Z v3.0.68 pid[19596] Memory stats: heapUsedMB=20 heapTotalMB=35 memoryRSSMB=63
2022-07-12T09:55:20.898Z v3.0.68 pid[19596] Logagent initialized
2022-07-12T09:55:20.910Z v3.0.68 pid[19596] Watching file:/var/solr/logs/solr_slow_requests.log from position: 4385606
2022-07-12T09:55:20.910Z v3.0.68 pid[19596] Watching file:/var/solr/logs/solr.log from position: 7340032
undefined
drop-events plugin: true - - -
INFO
drop-events plugin: true - - -
INFO
drop-events plugin: true - - -
INFO
drop-events plugin: true - - -
INFO
drop-events plugin: true - - -
INFO

The issue is present in versions v3.0.68 - v3.1.2 and seems to have been introduced by this commit.