Sub-path handling

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