[MM-15639] Add config setting to explicitly define which IP headers are trusted (#10907)

* Add config setting to explicitly define which IP headers are trusted

* fix variable shadowing

* Optimize code flow; Add Ratelimit test for header set

* Extend Ratelimit tests

* Add additional unit tests

* Structured logging

config/default.json

@@ -14,6 +14,7 @@
         "UseLetsEncrypt": false,
         "LetsEncryptCertificateCacheFile": "./config/letsencrypt.cache",
         "Forward80To443": false,
+        "TrustedProxyIPHeader": [],
         "ReadTimeout": 300,
         "WriteTimeout": 300,
         "MaximumLoginAttempts": 10,