Further tweaks for univention app (#264)

* add option to change base path
* fix env name
* add kweb configuration for using konnect in a subpath
* make webapp display configurable
* more explicit startup messages
* add ability to use an external oidc provider
* install the grapi ldap backend in the image when building with a recent enough kopano version
* add the ability to run test in the konnect container
  * the startup script gets more and more complicated, there should be a way to test it
* test some values and add test helper
* do not simply cat the registration, but call with yq
* update kweb and konnect

examples/meet/docker-compose.yml

@@ -154,6 +154,7 @@ services:
       - KCCONF_MEET_disableFullGAB=false
       - KCCONF_MEET_guests_enabled=true
       - KCCONF_MEET_useIdentifiedUser=true
+      - KCCONF_MEET_GRID_WEBAPP=no
     depends_on:
       - kopano_kapi
       - kopano_konnect