use meta in antispam_field

[DmitryRomanov]

Description

Use value from in antispam

pipelines:
  http:
    input:
      type: http
      address: ":9400"
      meta:
        remote_addr: "{{ .remote_addr }}"
    settings:
      antispam_threshold: 10
      antispam_field: remote_addr

meta from file input plugin

filename

symlink

inode

offset

antispam_banned metric with antispam_field label

pass eventTime (decoded from cri format) to antispam

dont count event in antispam if period more than maintenance period