Cherry-pick #4417 to 5.x: Nginx module: use first not private IP address as remote_ip #4703
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Cherry-pick of PR #4417 to 5.x branch. Original message:
A common customization to the nginx logs is to add the contents
of the X-Forwarded-For header in front of the remote IPs. This
typically results in a list of remote IPs.
This adds a new field
remote_ip_list
which is an array, and usesa Painless script to automatically select the first non-private
IP for the
remote_ip
field, which is the field on which GeoIP isapplied.
Fixes #4322.