Netdiff

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- `55 <https://github.com/ninuxorg/netdiff/pull/55>`_:
Added a label in OpenvpnParser output
- `52 <https://github.com/ninuxorg/netdiff/pull/52>`_:
Added a label in NetjsonParser output
- `49 <https://github.com/ninuxorg/netdiff/pull/49>`_:
Added support to TAP mode in OpenVPN parser

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- `47 <https://github.com/ninuxorg/netdiff/pull/47>`_:
Added OpenVPN parser

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- `40 <https://github.com/ninuxorg/netdiff/issues/40>`_:
implemented stricter input (**backward incompatible**)

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- pinned precise supported versions of dependencies to avoid incompatibilities

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- `c79b745 <https://github.com/ninuxorg/netdiff/commit/c79b745>`_: fixed return value of ``_get_primary_address()`` in ``BatmanParser``

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- `36 <https://github.com/ninuxorg/netdiff/issues/36>`_: fixed wrong diff when same nodes but different links