IXFR special cases handling
Fixes #307 (closed), see the issue description and the discussion below for details. I went for option A for case (2) as no other people voted. ;-). Case (3) has been modified as proposed by @jvcelak.
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Fixes #307 (closed), see the issue description and the discussion below for details. I went for option A for case (2) as no other people voted. ;-). Case (3) has been modified as proposed by @jvcelak.