Merge changes from apertis/v2021-security into apertis/v2021

browser/components/enterprisepolicies/Policies.jsm

@@ -1496,6 +1496,7 @@ var Policies = {
         "security.mixed_content.block_active_content",
         "security.osclientcerts.autoload",
         "security.ssl.errorReporting.enabled",
+        "security.tls.enable_0rtt_data",
         "security.tls.hello_downgrade_check",
         "security.tls.version.enable-deprecated",
         "security.warn_submit_secure_to_insecure",