/td><td><code>false</code></td><td>If enabled, pilot will generate Envoy configuration that does not use safe_regex but the older, deprecated regex field. This should only be enabled to support legacy deployments that have not yet been migrated to the new safe regular expressions.</td></tr><tr><td><code>PILOT_HTTP10</code></td><td>Boolean</td><td><code>false</code></td><td>Enables the use of HTTP 1.0 in the outbound HTTP listeners, to support legacy applications.</td></tr><tr><td><code>PILOT_INBOUND_PROTOCO