fix remaining packages to new format

- still needs testing

tasks/pkgs/thunderbird.yml

@@ -1,11 +1,13 @@
 # vim: set filetype=yaml.ansible :
 ---
-- name: append to syspkgs
-  set_fact:
-    syspkgs: "{{ syspkgs + [ 'thunderbird' ] }}"
-  when: ansible_os_family != 'Darwin'
+- name: Append to pkg_sys
+  when:
+    - ansible_system == 'Linux'
+  ansible.builtin.set_fact:
+    pkg_sys: "{{ pkg_sys + ['thunderbird'] }}"
 
-- name: append to caskpkgs
-  set_fact:
-    caskpkgs: "{{ caskpkgs + [ 'thunderbird' ] }}"
-  when: ansible_os_family == 'Darwin'
+- name: Append to pkg_cask
+  when:
+    - ansible_system == 'Darwin'
+  ansible.builtin.set_fact:
+    pkg_cask: "{{ pkg_cask + ['thunderbird'] }}"