-value-pairs>Modified <code>global</code> key/value pairs</h3><table><thead><tr><th>Key</th><th>Old Default Value</th><th>New Default Value</th><th>Old Description</th><th>New Description</th></tr></thead><tbody><tr><td><code>global.hub</code></td><td><code>gcr.io/istio-release</code></td><td><code>gcr.io/istio-release</code></td><td></td><td><code>Default hub for Istio images.Releases are published to docker hub under 'istio' project.Daily builds from prow are on gcr.io, and nightly builds from circle on d