allow to pass arguments to the postgres process

roles/matrix-postgres/defaults/main.yml

@@ -22,6 +22,10 @@ matrix_postgres_docker_image_force_pull: "{{ matrix_postgres_docker_image_to_use
 # A list of extra arguments to pass to the container
 matrix_postgres_container_extra_arguments: []
 
+# A list of extra arguments to pass to the postgres process
+# e.g. "-c 'max_connections=200'"
+matrix_postgres_process_extra_arguments: []
+
 # Controls whether the matrix-postgres container exposes a port (tcp/5432 in the
 # container) that can be used to access the database from outside the container (e.g. with psql)
 #