We do not need to verify the certificate for smarthost

[stephdl]

We have a case where the certificate is not trusted by curl, we could avoid to verify the certificate before to send a test email (smarthost validation)

https://community.nethserver.org/t/sending-system-mails-over-an-other-server/18353/40

with this PR we skip the cert verification, we can find this

> STARTTLS
< 220 2.0.0 Ready to start TLS
* Initializing NSS with certpath: sql:/etc/pki/nssdb
* skipping SSL peer certificate verification
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0* SSL connection using TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384

instead of

> STARTTLS
< 220 2.0.0 Ready to start TLS
* Initializing NSS with certpath: sql:/etc/pki/nssdb
*   CAfile: /etc/pki/tls/certs/ca-bundle.crt
  CApath: none
* SSL connection using TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384

The command for QA is

echo '{"action":"test-smarthost","SmartHostName":"smtp.domain.com","SmartHostPort":"587","SmartHostUsername":"stephane@domain.com","SmartHostPassword":"azerty","SmartHostTlsStatus":true}' | /usr/bin/sudo /usr/libexec/nethserver/api/system-settings/execute | jq

NethServer/dev#6516

[nethbot]

in 7.9.2009/autobuild:

• nethserver-cockpit-1.10.0-1.4.pr339.g57a1116.ns7.noarch.rpm x86_64 armhfp aarch64
• nethserver-cockpit-lib-1.10.0-1.4.pr339.g57a1116.ns7.noarch.rpm x86_64 armhfp aarch64

[gsanchietti]

I agree, certificate check shot not be needed here

Still, I would like a review also from @DavidePrincipi

[DavidePrincipi]

I agree to disable the certificate check because if that check fails Postfix does not use TLS at all.