Update (#3)

* udate changelogs

* update changelog collection script to cope with multiple flavours, while here, also swich to python3

* update changelogs

* netmap / bpf, adjust information, seemed to have been a side affect pre-21.1

* clarify number of Public Services needed (opnsense#309)

* Add new LTE card to interfaces.rst (opnsense#308)

@tomlawesome thanks for confirming

* fix broken links for the changelogs

* changelog: here be dragons

* remove custom theme instructions and templates and move back to standard using existing options.

* pip[3] in case pip3 doesn't exist :)

* update changelogs

* parse changelog Links

* update api docs, closes opnsense#310

* Fix typo (opnsense#311)

* Firmware: fix some spelling errors (opnsense#313)

* www/nginx update docs for upstream verify (opnsense#305)

* Correcting mismatched interfaces in upload rule (opnsense#314)

The names of the interfaces were wrong in the upload rule

* hint to cronjobs for shorter backup intervals (opnsense#315)

* release notes:

* HA-Sync cron job: add documentation, closes opnsense/core#4604

* Wireguard selective routing how-to (opnsense#317)

* Update wireguard-client.rst to clarify use of WireGuard net (opnsense#304)

This proposed tweak to the how-to is intended to address the issue discussed in this forum thread: https://forum.opnsense.org/index.php?topic=21170.0

* API: Add a note for postman users (opnsense#318)

Co-authored-by: Ad Schellevis <ad@opnsense.org>
Co-authored-by: sjjh <2787214+sjjh@users.noreply.github.com>
Co-authored-by: tomlawesome <76453276+tomlawesome@users.noreply.github.com>
Co-authored-by: Franco Fichtner <franco@opnsense.org>
Co-authored-by: Stephan de Wit <33954429+swhite2@users.noreply.github.com>
Co-authored-by: kulikov-a <36099472+kulikov-a@users.noreply.github.com>
Co-authored-by: Bruno Magnum Vasconcelos Monteiro Salazar <salazar.bruno@gmail.com>
Co-authored-by: Marc Leuser <marcquark@users.noreply.github.com>