+$gWebDomain will probably exist already; change it as shown above.
+
+$gMaintainerFileOverride is the name of a file used to manually override the
+Maintainers file (which is often automatically generated).
+
+$gUnknownMaintainerEmail is the address to mail when a bug report arrives
+for a package with no maintainer in $gMaintainerFile or
+$gMaintainerFileOverride.
+
+$gPackageSource is a file containing three tab-separated columns: package
+name, component (e.g. main, contrib, non-free), and the corresponding source
+package name.