Move all config options out of couch_httpd_auth and httpd

[wohali]

These should all be in [chttpd] now.

Similarly, the [httpd] section is very misleading in 3.x. If there is a way we can drop this entirely for 3.2 that'd be outstanding - everything that matters should be in [chttpd].

The way we've handled this transition in the past is to check both config spaces, giving priority to the new definition's location. Then in the future (4.0?) we can drop support for the old config location. So this is probably 2 PRs, one to main and one to 3.x.

[nickva]

Good idea. Those settings are all over the place currently. Some settings like max_http_request_size are in httpd section only and are re-used by chttpd handling code.

[jiahuili430]

I will give it a try, but I'm wondering since the httpd config section is used to configure the "backend" port, and the port still looks like it's open on 3.x (verify by trying curl to: 15986). Will the port stays open in 3.2, or will we close it and only use /_node/$node/ for access?

[wohali]

@jiahuili430 That is only during our testing; it is not supported for production use and is disabled unless special steps are taken to enable it.

[nickva]

Re-opened the issue as it was closed by accident through one of the "fixes: ..." lines in the commits probably