with all the building methods.
* Refuse to do quilt fixup (explicitly or as a result of build).
Closes:#731632.
+ * Be able to clone or fetch from Debian backports suites (which are
+ a bit like main Debian suites but also a bit not like them).
+ * Compute "-v" option default value (changelog version since) correctly
+ for Debian backports suites.
+ * Closes:#733954.
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