Log Message:
Update to 9.11. From the changelog:

- Rebuild test suite certificate chains (which had expired: #609)
- Fix stray (null) in URL path after Pulse authentication.
- Fix config XML parsing mistake that left GlobalProtect ESP non-working
  in v9.10 (!475).
- Fix case sensitivity in GPST header matching (!474).
- Add external browser support for Windows (#553).