* When synthesing a commit from a .dsc from the archive, stop
internal git reset from printing a confusing message about HEAD.
* Turn off git gc in the private working areas.
+ * Do not fail to do some important quilt processing in some
+ --quilt modes.
+ * Fix two calls to chdir without proper error checking.
+ * Fix a couple of bugs in error reporting.
+ * Fix up .orig detection to be less trustful of (ambiguous) filenames.
Test suite:
* When sbuild fails, do not crash due to sed not finding the log