* add close proxy op
* Move to actual closing routine
* Fix e2e tests for CloseProxy
* Add warning on resource exhaustion
* Add CloseProxy to manual close
* retuen errors to `CloseProxy` callers
* Allow server plugin to talk to https services. Option for skipping tls verification
* Rename TlsVerify to TLSVerify
* Server plugin should use default http transport when scheme is not https