This option controls requests under the source path:

- Keep sub-paths
  Requests under the source path keep the same trailing path under the destination,
  e.g.: `/old/path` → `/new/path`
- Ignore sub-paths
  Requests under the source path are redirected to the destination itself, without appending the trailing path,
  e.g.: `/old/path` → `/new`
- Only redirect exact source path
  Only the exact source path is redirected,
  e.g.: `/old` → `/new`

This option only controls URL path handling. The request query string, such as `?dolphin=54`, is controlled by Query string handling. A file-like last path segment, such as `index.html`, is controlled by Filename handling when sub-paths are kept.