Accept self-signed certs

[dusiema]

This will check for self-signed certs and validate against it. Useful for servers that use self-sigened certs. The certfile has to part of the app and reachable/loadable via Bundle for this to work.

[dusiema]

Checking this locally first...

[dusiema]

Tested this briefly and it does works. This is more of a suggestion to consider making EventSource work with self-signed certs. I guess it needs code review and more testing.