globals: Keep ExternalURL up to date (!4264) · Merge requests · Warren Gifford / sourcegraph

Created by: tsenart

This commit makes the globals package keep up to date with changes to the configured ExternalURL in the management console (critical config).

Before this change, updates to the external URL were not reflected in many places in the app before it got restarted.

Test plan: Reproduction steps in #4056 (closed)

globals: Keep ExternalURL up to date