Update profile usr.sbin.ntpd and abstractions/ssl_certs

• abstractions/ssl_certs

  • On Arch Linux certificates are extracted to /etc/ca-certificates/ by the update-ca-trust script.
  • /etc/libressl/ is used by Arch Linux's libressl package.

• usr.sbin.ntpd:

  • Add abstractions/ssl_certs. OpenNTPD requires access to CA certificates when using the HTTPS constraint feature.