Reverse proxy authentication support (#1152)

* feat(auth): reverse proxy authentication support - #176

* address PR remarks

* Fix redaction of UI appConfig

Co-authored-by: Deluan <deluan@navidrome.org>

log/redactrus_test.go

@@ -121,6 +121,13 @@ func TestEntryDataValues(t *testing.T) {
 			expected:      logrus.Fields{"Description": "His name is [REDACTED]"},
 			description:   "William should have been redacted, but was not.",
 		},
+		{
+			name:          "map value",
+			redactionList: []string{"William"},
+			logFields:     logrus.Fields{"Description": map[string]string{"name": "His name is William"}},
+			expected:      logrus.Fields{"Description": "map[name:His name is [REDACTED]]"},
+			description:   "William should have been redacted, but was not.",
+		},
 	}
 
 	for _, test := range tests {