Option to disable ngx.log extra arguments client, server, request, host, etc.

nginx version: openresty/1.17.8.1rc1
built by gcc 9.3.0 (Ubuntu 9.3.0-10ubuntu2)
built with OpenSSL 1.1.0k 28 May 2019

lua-resty-core: 0.1.18
OS: Linux ea01851460a5 4.19.76-linuxkit #1 SMP Tue May 26 11:42:35 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

Hi All,

The default ngx.log(ngx.ERR, "hello world") is printing all the below information.
2017/07/09 19:36:25 [notice] 25932#0: *1 [lua] content_by_lua(nginx.conf:51):5: hello world, client: 127.0.0.1, server: localhost, request: "GET /log HTTP/1.1", host: "localhost"

https://github.com/openresty/lua-resty-core/blob/master/lib/ngx/errlog.md#raw_log

We would like to disable the extra information provided in the default ngx.log core module and only print the message we want based on some flag

2017/07/09 19:36:25 [notice] 25932#0: *1 [lua] content_by_lua(nginx.conf:51):5: hello world,

All the remaining fields such as client, server, request, host, upstream fields should not be printed based on some flag or some other way.

Background:
We are using Nginx as part of the gateway application to authenticate or authorize the backend applications.
When we using ngx.log(ngx.ERR, "message") it is also printing query params that had the OAuth2.0 Authorization Code details.

Start with the ngx.log behavior described in the issue and read the linked lua-resty-core errlog.md documentation, especially raw_log. Determine where the extra client, server, request, and host fields originate and how a flag or alternative logging path could control them. Done means the requested message-only behavior is defined and covered by suitable tests or documentation.