Make Matrix federation port configurable

Fixes #523 (Github Issue).

roles/matrix-base/defaults/main.yml

@@ -21,6 +21,8 @@ matrix_server_fqn_dimension: "dimension.{{ matrix_domain }}"
 # This is where you access Jitsi.
 matrix_server_fqn_jitsi: "jitsi.{{ matrix_domain }}"
 
+matrix_federation_public_port: 8448
+
 matrix_user_username: "matrix"
 matrix_user_groupname: "matrix"
 

roles/matrix-base/templates/static-files/well-known/matrix-server.j2

@@ -1,4 +1,4 @@
 #jinja2: lstrip_blocks: "True"
 {
-	"m.server": "{{ matrix_server_fqn_matrix }}:8448"
+	"m.server": "{{ matrix_server_fqn_matrix }}:{{ matrix_federation_public_port }}"
 }

roles/matrix-synapse/tasks/self_check_federation_api.yml

@@ -11,7 +11,7 @@
 
 - name: Fail if Matrix Federation API not working
   fail:
-    msg: "Failed checking Matrix Federation API is up at `{{ matrix_server_fqn_matrix }}` (checked endpoint: `{{ matrix_synapse_federation_api_url_endpoint_public }}`). Is Synapse running? Is port 8448 open in your firewall? Full error: {{ result_matrix_synapse_federation_api }}"
+    msg: "Failed checking Matrix Federation API is up at `{{ matrix_server_fqn_matrix }}` (checked endpoint: `{{ matrix_synapse_federation_api_url_endpoint_public }}`). Is Synapse running? Is port {{ matrix_federation_public_port }} open in your firewall? Full error: {{ result_matrix_synapse_federation_api }}"
   when: "matrix_synapse_enabled|bool and matrix_synapse_federation_enabled|bool and (result_matrix_synapse_federation_api.failed or 'json' not in result_matrix_synapse_federation_api)"
 
 - name: Fail if Matrix Federation API unexpectedly enabled

roles/matrix-synapse/vars/main.yml

@@ -3,7 +3,7 @@
 matrix_synapse_id_servers_public: ['vector.im', 'matrix.org']
 
 matrix_synapse_client_api_url_endpoint_public: "https://{{ matrix_server_fqn_matrix }}/_matrix/client/versions"
-matrix_synapse_federation_api_url_endpoint_public: "https://{{ matrix_server_fqn_matrix }}:8448/_matrix/federation/v1/version"
+matrix_synapse_federation_api_url_endpoint_public: "https://{{ matrix_server_fqn_matrix }}:{{ matrix_federation_public_port }}/_matrix/federation/v1/version"
 
 # Tells whether this role had executed or not. Toggled to `true` during runtime.
 matrix_synapse_role_executed: false