Make various Cinny options configurable via dedicated variables

Provoked by https://github.com/etkecc/mrs/pull/4
I've discovered that Cinny supports various configuration options and it'd be better
if we add support for them.

roles/custom/matrix-client-cinny/defaults/main.yml

@@ -147,9 +147,27 @@ matrix_client_cinny_self_check_validate_certificates: true
 # See `matrix_client_cinny_config_homeserverList`.
 matrix_client_cinny_default_hs_url: ""
 
+# Controls the `defaultHomeserver` value in the `config.json` file.
+matrix_client_cinny_config_defaultHomeserver: 0  # noqa var-naming
+
 # Controls the `homeserverList` value in the `config.json` file.
 matrix_client_cinny_config_homeserverList: "{{ [matrix_client_cinny_default_hs_url] }}"  # noqa var-naming
 
+# Controls the `allowCustomHomeservers` value in the `config.json` file.
+matrix_client_cinny_config_allowCustomHomeservers: true  # noqa var-naming
+
+# Controls the `featuredCommunities.spaces` value in the `config.json` file.
+matrix_client_cinny_config_featuredCommunities_spaces: []  # noqa var-naming
+
+# Controls the `featuredCommunities.rooms` value in the `config.json` file.
+matrix_client_cinny_config_featuredCommunities_rooms: []  # noqa var-naming
+
+# Controls the `featuredCommunities.servers` value in the `config.json` file.
+matrix_client_cinny_config_featuredCommunities_servers: ["matrix.org"]  # noqa var-naming
+
+# Controls the `featuredCommunities.openAsDefault` value in the `config.json` file.
+matrix_client_cinny_config_featuredCommunities_openAsDefault: false  # noqa var-naming
+
 # Default Cinny configuration template which covers the generic use case.
 # You can customize it by controlling the various variables inside it.
 #

roles/custom/matrix-client-cinny/templates/config.json.j2

@@ -1,4 +1,11 @@
 {
-  "defaultHomeserver": 0,
-  "homeserverList": {{ matrix_client_cinny_config_homeserverList | to_json }}
+  "defaultHomeserver": {{ matrix_client_cinny_config_defaultHomeserver | to_json }},
+  "homeserverList": {{ matrix_client_cinny_config_homeserverList | to_json }},
+  "allowCustomHomeservers": {{ matrix_client_cinny_config_allowCustomHomeservers | to_json }},
+  "featuredCommunities": {
+    "spaces": {{ matrix_client_cinny_config_featuredCommunities_spaces | to_json }},
+    "rooms": {{ matrix_client_cinny_config_featuredCommunities_rooms | to_json }},
+    "servers": {{ matrix_client_cinny_config_featuredCommunities_servers | to_json }},
+    "openAsDefault": {{ matrix_client_cinny_config_featuredCommunities_openAsDefault | to_json }}
+  }
 }