Merge #2818

2818: Improve auth-related logging r=mergify[bot] a=nextgens

## What type of PR?

enhancement

## What does this PR do?

Improve auth-related logging

### Related issue(s)
- closes #2803 

## Prerequisites
Before we can consider review and merge, please make sure the following list is done and checked.
If an entry in not applicable, you can check it or remove it from the list.

- [ ] In case of feature or enhancement: documentation updated accordingly
- [x] Unless it's docs or a minor change: add [changelog](https://mailu.io/master/contributors/workflow.html#changelog) entry file.


Co-authored-by: Florent Daigniere <nextgens@freenetproject.org>
Co-authored-by: Florent Daigniere <nextgens@users.noreply.github.com>

core/nginx/conf/nginx.conf

@@ -330,6 +330,7 @@ mail {
       protocol smtp;
       smtp_auth plain;
       auth_http_header Auth-Port 10025;
+      auth_http_header Client-Port $remote_port;
     }
 
     # Default IMAP server for the webmail (no encryption, but authentication)
@@ -338,6 +339,7 @@ mail {
       protocol imap;
       smtp_auth plain;
       auth_http_header Auth-Port 10143;
+      auth_http_header Client-Port $remote_port;
       # ensure we talk HAPROXY protocol to the backends
       proxy_protocol on;
     }
@@ -363,6 +365,7 @@ mail {
       protocol smtp;
       smtp_auth none;
       auth_http_header Auth-Port 25;
+      auth_http_header Client-Port $remote_port;
     }
 
     # All other protocols are disabled if TLS is failing
@@ -378,6 +381,7 @@ mail {
       protocol imap;
       imap_auth plain;
       auth_http_header Auth-Port 143;
+      auth_http_header Client-Port $remote_port;
       # ensure we talk HAPROXY protocol to the backends
       proxy_protocol on;
     }
@@ -393,6 +397,7 @@ mail {
       protocol pop3;
       pop3_auth plain;
       auth_http_header Auth-Port 110;
+      auth_http_header Client-Port $remote_port;
       # ensure we talk HAPROXY protocol to the backends
       proxy_protocol on;
     }
@@ -408,6 +413,7 @@ mail {
       protocol smtp;
       smtp_auth plain login;
       auth_http_header Auth-Port 587;
+      auth_http_header Client-Port $remote_port;
     }
 
     {% if TLS %}
@@ -419,6 +425,7 @@ mail {
       protocol smtp;
       smtp_auth plain login;
       auth_http_header Auth-Port 465;
+      auth_http_header Client-Port $remote_port;
     }
 
     server {
@@ -429,6 +436,7 @@ mail {
       protocol imap;
       imap_auth plain;
       auth_http_header Auth-Port 993;
+      auth_http_header Client-Port $remote_port;
       # ensure we talk HAPROXY protocol to the backends
       proxy_protocol on;
     }
@@ -441,6 +449,7 @@ mail {
       protocol pop3;
       pop3_auth plain;
       auth_http_header Auth-Port 995;
+      auth_http_header Client-Port $remote_port;
       # ensure we talk HAPROXY protocol to the backends
       proxy_protocol on;
     }

core/nginx/conf/proxy.conf

@@ -1,6 +1,7 @@
 # Default proxy setup
 proxy_set_header Host $http_host;
 proxy_set_header X-Real-IP $remote_addr;
+proxy_set_header X-Real-Port $remote_port;
 proxy_hide_header True-Client-IP;
 proxy_hide_header CF-Connecting-IP;