Add privacy policy links (#1861)

* Add privacy policy links for hosting providers

* Add privacy policy links for calendar-contacts-sync

* Add privacy policy links for email-clients

* Add privacy policy links for file-encryption

* Add privacy policy links for password-managers

* Add privacy policy links for paste-services

* Add privacy policy links for productivity-tools

* Add privacy policy links for selfhosted-cloud

_includes/sections/email-clients.html

@@ -5,6 +5,7 @@ title="Thunderbird"
 image="/assets/img/svg/3rd-party/thunderbird.svg"
 description="Thunderbird is a free, open source, cross-platform email, newsgroup, news feed, and chat (XMPP, IRC, Twitter) client developed by the Thunderbird community, and previously by the Mozilla Foundation."
 website="https://www.thunderbird.net/"
+privacy-policy="https://www.mozilla.org/en-US/privacy/thunderbird/"
 forum="https://forum.privacytools.io/t/discussion-thunderbird/659"
 source="https://hg.mozilla.org/comm-central/"
 windows="https://www.thunderbird.net/en-US/"