We should update Commons Net library to its latest version. It could help to fix some reported issues, e.g. issue #269601.
Please review, thanks.
If there are no objections, I will push the change tomorrow.
Integrated into 'main-silver', will be available in build *201704050002* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress)
User: Tomas Mysik <email@example.com>
Log: #270210 - Update commons-net library to 3.6