Anil db/v0.39

[anil-db]

an upstream pull has also been created vectordotdev#21365

we have a usecase where server is behind a reverse proxy and it selects the right backend based on SNI provided.

This PR adds options to set SNI which sending to other IP/domain. this unblocks the nephos use case where we can use local envoy to connect VA.

test configuration:

{
    "sinks": {
	    "grpc_aggregator": {
            "address": "https://127.0.0.1:443",
            "inputs": [
                "http"
            ],
            "tls": {
	        "ca_file": "/Users/anil.gupta/universe/woodchuck/regtests/resources/testCA.pem",
                "crt_file": "/Users/anil.gupta/universe/woodchuck/regtests/resources/localhostcrt.pem",
                "key_file": "/Users/anil.gupta/universe/woodchuck/regtests/resources/localhostkey.pem",	    
                "enabled": true,
                "verify_certificate": true,
                "verify_hostname": false,
		"server_name": "www.example.com"
            },
            "type": "vector"
        },
	    "aggregator": {
            "uri": "https://127.0.0.1:444",
	    "encoding": {
                  "codec": "json"             },
            "inputs": [
                "http"
            ],
            "tls": {
                "ca_file": "/Users/anil.gupta/universe/woodchuck/regtests/resources/testCA.pem",
                "crt_file": "/Users/anil.gupta/universe/woodchuck/regtests/resources/localhostcrt.pem",
                "key_file": "/Users/anil.gupta/universe/woodchuck/regtests/resources/localhostkey.pem",
                "verify_certificate": true,
                "verify_hostname": false,
		"server_name": "www.example.com"
            },
            "type": "http"
        },
	"print": {
            "encoding": {
                "codec": "json"
            },
            "inputs": [
                "http2",
		"agent"
            ],
            "type": "console"
        }
    },
    "sources": {
	"agent": {
            "address": "0.0.0.0:443",
            "tls": {
                "alpn_protocols": [
                    "h2"
                ],
		"ca_file": "/Users/anil.gupta/universe/woodchuck/regtests/resources/testCA.pem",
                "crt_file": "/Users/anil.gupta/universe/woodchuck/regtests/resources/localhostcrt.pem",
                "enabled": true,
                "key_file": "/Users/anil.gupta/universe/woodchuck/regtests/resources/localhostkey.pem",
                "verify_certificate": true,
                "verify_hostname": false
            },
            "type": "vector"
        },
        "http": {
            "address": "0.0.0.0:6000",
            "framing": {
                "method": "bytes"
            },
            "headers": [

            ],
            "keepalive": {
                "max_connection_age_secs": 300
            },
            "strict_path": false,
            "tls": {
                "alpn_protocols": [
                    "h2"
                ],
                "ca_file": "/Users/anil.gupta/universe/woodchuck/regtests/resources/testCA.pem",
                "crt_file": "/Users/anil.gupta/universe/woodchuck/regtests/resources/localhostcrt.pem",
                "enabled": true,
                "key_file": "/Users/anil.gupta/universe/woodchuck/regtests/resources/localhostkey.pem",
                "verify_certificate": false
            },
            "type": "http_server"
        },
	"http2": {
            "address": "0.0.0.0:444",
            "framing": {
                "method": "bytes"
            },
            "headers": [

            ],
            "keepalive": {
                "max_connection_age_secs": 300
            },
            "strict_path": false,
            "tls": {
                "alpn_protocols": [
                    "h2"
                ],
                "ca_file": "/Users/anil.gupta/universe/woodchuck/regtests/resources/testCA.pem",
                "crt_file": "/Users/anil.gupta/universe/woodchuck/regtests/resources/localhostcrt.pem",
                "enabled": true,
                "key_file": "/Users/anil.gupta/universe/woodchuck/regtests/resources/localhostkey.pem",
                "verify_certificate": false
            },
            "type": "http_server"
        }
    }
}

sent log data to http source using curl -k "https://localhost:6000" -d "hi"
and captured client hello frame from wrieshark on triggered by http sink and other triggered by vector sink