help / feature request - certinfo for remote server with chain

Would it be possible to use cfssl to get a certificate chain presented by a remote server?

I was expecting it to be available when using `certinfo` (e.g. `cfssl certinfo -domain example.com:443`). The result I'm looking for is something that would mimic `cat /dev/null | openssl s_client -showcerts -connect example.com:443`, which returns:

```
CONNECTED(00000005)
depth=2 C = US, O = DigiCert Inc, OU = www.digicert.com, CN = DigiCert Global Root CA
verify return:1
depth=1 C = US, O = DigiCert Inc, CN = DigiCert TLS RSA SHA256 2020 CA1
verify return:1
depth=0 C = US, ST = California, L = Los Angeles, O = Internet\C2\A0Corporation\C2\A0for\C2\A0Assigned\C2\A0Names\C2\A0and\C2\A0Numbers, CN = www.example.org
verify return:1
write W BLOCK
---
Certificate chain
0 s:/C=US/ST=California/L=Los Angeles/O=Internet\xC2\xA0Corporation\xC2\xA0for\xC2\xA0Assigned\xC2\xA0Names\xC2\xA0and\xC2\xA0Numbers/CN=www.example.org
i:/C=US/O=DigiCert Inc/CN=DigiCert TLS RSA SHA256 2020 CA1
-----BEGIN CERTIFICATE-----
...
-----END CERTIFICATE-----
1 s:/C=US/O=DigiCert Inc/CN=DigiCert TLS RSA SHA256 2020 CA1
i:/C=US/O=DigiCert Inc/OU=www.digicert.com/CN=DigiCert Global Root CA
-----BEGIN CERTIFICATE-----
...
-----END CERTIFICATE-----
---
Server certificate
subject=/C=US/ST=California/L=Los Angeles/O=Internet\xC2\xA0Corporation\xC2\xA0for\xC2\xA0Assigned\xC2\xA0Names\xC2\xA0and\xC2\xA0Numbers/CN=www.example.org
issuer=/C=US/O=DigiCert Inc/CN=DigiCert TLS RSA SHA256 2020 CA1
---
No client certificate CA names sent
Server Temp Key: ECDH, P-256, 256 bits
---
SSL handshake has read 3775 bytes and written 687 bytes
---
New, TLSv1/SSLv3, Cipher is AEAD-AES256-GCM-SHA384
Server public key is 2048 bit
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
SSL-Session:
Protocol : TLSv1.3
Cipher : AEAD-AES256-GCM-SHA384
Session-ID:
Session-ID-ctx:
Master-Key:
Start Time: 1674259406
Timeout : 7200 (sec)
Verify return code: 0 (ok)
---
DONE
```