* appservice: add and use matrix_homeserver_* vars
* appservice: use the new vars
* Apply suggestions from code review
Co-authored-by: Slavi Pantaleev <slavi@devture.com>
Co-authored-by: Slavi Pantaleev <slavi@devture.com>
Details here: https://docs.ansible.com/ansible/devel/porting_guides/porting_guide_6.html#id36
Basically:
```yaml
- name: Prior to 2.13
debug:
msg: '[1] + {{ [2] }}'
- name: 2.13 and forward
debug:
msg: '{{ [1] + [2] }}'
```
Interestingly, we had been using the new/safe syntax in lofs of places.
We were using the broken one in many others though. Hopefully all
instances were fixed by this patch.
Shaleen Jain
Cody Wyatt Neiman
Slavi Pantaleev
Marko Weltzer
Aaron Raimist
Hugues Morisset