vendor: Add dependencies for strelaypoolsrv

vendor/github.com/oschwald/maxminddb-golang/errors.go

@@ -0,0 +1,38 @@
+package maxminddb
+
+import (
+	"fmt"
+	"reflect"
+)
+
+// InvalidDatabaseError is returned when the database contains invalid data
+// and cannot be parsed.
+type InvalidDatabaseError struct {
+	message string
+}
+
+func newInvalidDatabaseError(format string, args ...interface{}) InvalidDatabaseError {
+	return InvalidDatabaseError{fmt.Sprintf(format, args...)}
+}
+
+func (e InvalidDatabaseError) Error() string {
+	return e.message
+}
+
+// UnmarshalTypeError is returned when the value in the database cannot be
+// assigned to the specified data type.
+type UnmarshalTypeError struct {
+	Value string       // stringified copy of the database value that caused the error
+	Type  reflect.Type // type of the value that could not be assign to
+}
+
+func newUnmarshalTypeError(value interface{}, rType reflect.Type) UnmarshalTypeError {
+	return UnmarshalTypeError{
+		Value: fmt.Sprintf("%v", value),
+		Type:  rType,
+	}
+}
+
+func (e UnmarshalTypeError) Error() string {
+	return fmt.Sprintf("maxminddb: cannot unmarshal %s into type %s", e.Value, e.Type.String())
+}