whonixcheck: Optional torproject.org certificate pinning option for Socks/Trans-Port Test and Tor Browser Update Check. New --pin-tpo-cert, --no-pin-tpo-cert command line option / new PIN_TPO_CERT="true" or PIN_TPO_CERT="false" /etc/whonix.d/ configuration option. See also: https://www.whonix.org/wiki/Whonixcheck#SSL_Certificate_Pinning