Suggestion: show also intermediate certificates

[fhtino]

I think it would be useful to add an options to show all the chain of certificates of the target server. --show-certificates-chain ? To obtain information like openssl s_client -showcerts -servername www.google.com -connect www.google.com:443 (output below)

depth=2 C = US, O = Google Trust Services LLC, CN = GTS Root R1
verify return:1
depth=1 C = US, O = Google Trust Services LLC, CN = GTS CA 1C3
verify return:1
depth=0 CN = www.google.com
verify return:1
---
Certificate chain
 0 s:CN = www.google.com
   i:C = US, O = Google Trust Services LLC, CN = GTS CA 1C3
-----BEGIN CERTIFICATE-----
MIIEhzCCA2+gAwIBAgIQVdFprTEJgzAKxocveosrFDANBgkqhkiG9w0BAQsFADBG
MQswCQYDVQQGEwJVUzEiMCAGA1UEChMZR29vZ2xlIFRydXN0IFNlcnZpY2VzIExM
..........................
fp1cjak++K1hc2ZxTemL+0wE832q7wHnDlh9OzdJmXilDYcJ6DpGg8Qqvj3TIHYk
aC5EY1kgrYcs7q/otmmRGEgQR+hyy2KLbUBQ6tgbBDMnVYaDzlnQq4u0e4+hb5rj
WUjiMgW9keWioBA=
-----END CERTIFICATE-----
 1 s:C = US, O = Google Trust Services LLC, CN = GTS CA 1C3
   i:C = US, O = Google Trust Services LLC, CN = GTS Root R1
-----BEGIN CERTIFICATE-----
MIIFljCCA36gAwIBAgINAgO8U1lrNMcY9QFQZjANBgkqhkiG9w0BAQsFADBHMQsw
CQYDVQQGEwJVUzEiMCAGA1UEChMZR29vZ2xlIFRydXN0IFNlcnZpY2VzIExMQzEU
..........................
juDEI/9bfU1lcKwrmz3O2+BtjjKAvpafkmO8l7tdufThcV4q5O8DIrGKZTqPwJNl
1IXNDw9bg1kWRxYtnCQ6yICmJhSFm/Y3m6xv+cXDBlHz4n/FsRC6UfTd
-----END CERTIFICATE-----
 2 s:C = US, O = Google Trust Services LLC, CN = GTS Root R1
   i:C = BE, O = GlobalSign nv-sa, OU = Root CA, CN = GlobalSign Root CA
-----BEGIN CERTIFICATE-----
MIIFYjCCBEqgAwIBAgIQd70NbNs2+RrqIQ/E8FjTDTANBgkqhkiG9w0BAQsFADBX
MQswCQYDVQQGEwJCRTEZMBcGA1UEChMQR2xvYmFsU2lnbiBudi1zYTEQMA4GA1UE
..........................
+qduBmpvvYuR7hZL6Dupszfnw0Skfths18dG9ZKb59UhvmaSGZRVbNQpsg3BZlvi
d0lIKO2d1xozclOzgjXPYovJJIultzkMu34qQb9Sz/yilrbCgj8=
-----END CERTIFICATE-----
---
Server certificate
subject=CN = www.google.com
issuer=C = US, O = Google Trust Services LLC, CN = GTS CA 1C3