feat(publicip): resilient public ip fetcher (#2518)

- `PUBLICIP_API` accepts a comma separated list of ip data sources, where the first one is the base default one, and sources after it are backup sources used if we are rate limited.
- `PUBLICIP_API` defaults to `ipinfo,ifconfigco,ip2location,cloudflare` such that it now has `ifconfigco,ip2location,cloudflare` as backup ip data sources.
- `PUBLICIP_API_TOKEN` accepts a comma separated list of ip data source tokens, each corresponding by position to the APIs listed in `PUBLICIP_API`.
- logs ip data source when logging public ip information
- assume a rate limiting error is for 30 days (no persistence)
- ready for future live settings updates
  - consider an ip data source no longer banned if the token changes
  - keeps track of ban times when updating the list of fetchers

internal/configuration/settings/mocks_reader_test.go

@@ -0,0 +1,77 @@
+// Code generated by MockGen. DO NOT EDIT.
+// Source: github.com/qdm12/gosettings/reader (interfaces: Source)
+
+// Package settings is a generated GoMock package.
+package settings
+
+import (
+	reflect "reflect"
+
+	gomock "github.com/golang/mock/gomock"
+)
+
+// MockSource is a mock of Source interface.
+type MockSource struct {
+	ctrl     *gomock.Controller
+	recorder *MockSourceMockRecorder
+}
+
+// MockSourceMockRecorder is the mock recorder for MockSource.
+type MockSourceMockRecorder struct {
+	mock *MockSource
+}
+
+// NewMockSource creates a new mock instance.
+func NewMockSource(ctrl *gomock.Controller) *MockSource {
+	mock := &MockSource{ctrl: ctrl}
+	mock.recorder = &MockSourceMockRecorder{mock}
+	return mock
+}
+
+// EXPECT returns an object that allows the caller to indicate expected use.
+func (m *MockSource) EXPECT() *MockSourceMockRecorder {
+	return m.recorder
+}
+
+// Get mocks base method.
+func (m *MockSource) Get(arg0 string) (string, bool) {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "Get", arg0)
+	ret0, _ := ret[0].(string)
+	ret1, _ := ret[1].(bool)
+	return ret0, ret1
+}
+
+// Get indicates an expected call of Get.
+func (mr *MockSourceMockRecorder) Get(arg0 interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Get", reflect.TypeOf((*MockSource)(nil).Get), arg0)
+}
+
+// KeyTransform mocks base method.
+func (m *MockSource) KeyTransform(arg0 string) string {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "KeyTransform", arg0)
+	ret0, _ := ret[0].(string)
+	return ret0
+}
+
+// KeyTransform indicates an expected call of KeyTransform.
+func (mr *MockSourceMockRecorder) KeyTransform(arg0 interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "KeyTransform", reflect.TypeOf((*MockSource)(nil).KeyTransform), arg0)
+}
+
+// String mocks base method.
+func (m *MockSource) String() string {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "String")
+	ret0, _ := ret[0].(string)
+	return ret0
+}
+
+// String indicates an expected call of String.
+func (mr *MockSourceMockRecorder) String() *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "String", reflect.TypeOf((*MockSource)(nil).String))
+}