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bug #4478 Server validation does not work while in setup/mysqli

Signed-off-by: Marc Delisle <marc@infomarc.info>
ChangeLog entry

Signed-off-by: Marc Delisle <marc@infomarc.info>
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Merge remote-tracking branch 'origin/QA_4_2' into QA_4_2
Merge commit 'c121bb7'
Merge commit '0314678'
Merge commit '73ab0b1'
Merge commit 'fe1dce0'