daan: fix typo:  `update_kn{forum -> fotos}_lock`
subscriptions: only confirm for open events
base: add favicon.ico

Closes: #136
Thanks-to: Ayke <ayke@kn.cx>
Signed-off-by: Bas Westerbaan <bas@karpenoktem.nl>
Merge pull request #135 from karpenoktem/only-confirm-open-events

subscriptions: only confirm for open events
Add update for phone number to API
Adds button for adding new phone number
Merge pull request #139 from mrngm/modify-phone

Zorgt voor toevoegen telefoonnummer, issue #113
Merge github.com:khandhas-infra/kninfra into activiteit-formatting