Arouteserver

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- The ``filtering.rpsl`` section of general and clients configuration files has been renamed into ``filtering.irrdb``.
- The command line argument ``--template-dir`` has been renamed into ``--templates-dir``.
- New options in the program's configuration file: ``bgpq3_host`` and ``bgpq3_sources``, used to set bgpq3 ``-h`` and ``-S`` arguments when gathering info from IRRDBs.

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- New command to build textual representations of configurations: ``html``.

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- New command to initialize a custom live test scenario: ``init-scenario``.

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- New feature: selective path prepending via BGP communities.
- The ``control_communities`` general option has been removed: it was redundant.

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- Improved communities configuration and handling.
- Fix issue on standard communities matching against 32-bit ASNs.
- Fix issue on IPv6 prefix validation.

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- New feature: RPKI-based filtering/tagging.