Add ability to disable SSL certificate validation

[afilimonov]

Currently if remote certificate is not trusted eg self signed cert the http request would fail. Add something like ssl_verify_mode congratulation parameter.

[afilimonov]

After looking around it seems that it would need updating manticore which Logstash http client is based on? Is there a definitive guide how to trust an invalid certificate? Exporting it and adding to the JKS doesn’t seem to work.

[jeffrmorton]

Just encountered this issue myself. Including the CA certificate in the trust store does not appear to work and there is no way to disable verification.

[farrp]

The logstash-output-http has a similar issue and I suspect both have the same solution: logstash-plugins/logstash-output-http#119

[roaksoax]

Closing this issue given that it has been fixed by 08228a0