nginx: remove a few fields from json_reduced

This brings it in line with the non-JSON reduced log format.

changed title from nginx: remove a few fields from {--}json_reduced{--} to nginx: remove a few fields from json_reduced

added 3 commits

• 3f784a0e...dc9167d9 - 2 commits from branch master
• bb65a79f - nginx: remove a few fields from json_reduced

Compare with previous version

enabled an automatic merge when the pipeline for bb65a79f succeeds

mentioned in commit 1dd35847

merged