Log Message:
Updated p5-IO-Socket-SSL to 2.027.

2.027 2016/04/20
- only added Changes for 2.026
2.026 2016/04/20
- update default server and client ciphers based on recommendation of
  Mozilla and what the current browsers use. Notably this finally disables
  RC4 for the client (was disabled for server long ago) and adds CHACHA20.