User unexpire (#39758)

* Allow negative values to expires to unexpire a user

Fixes #20096

(cherry picked from commit 34f8080a19c09cd20ec9c045fca1e37ef74bb1e6)
(cherry picked from commit 54619f70f4b79f121c5062d54e9732d3cbb24377)
(cherry picked from commit 8c2fae27d6e2af810112032bb1dfef5459035b7e)
(cherry picked from commit db1a32f8caa8c8b9f989baa65784d4b2b5cad1f8)

* tweaked and normalized

 - also added tests, made checking resilient

test/integration/targets/user/tasks/main.yml

@@ -246,3 +246,56 @@
     - name: Restore original timezone - {{ original_timezone.diff.before.name }}
       timezone:
         name: "{{ original_timezone.diff.before.name }}"
+
+
+- name: Unexpire user
+  user:
+    name: ansibulluser
+    state: present
+    expires: -1
+  register: user_test_expires3
+
+- name: Verify un expiration date for Linux
+  block:
+    - name: LINUX | Get expiration date for ansibulluser
+      getent:
+        database: shadow
+        key: ansibulluser
+
+    - name: LINUX | Ensure proper expiration date was set
+      assert:
+        msg: "expiry is supposed to be empty or -1, not {{getent_shadow['ansibulluser'][6]}}"
+        that:
+          - not getent_shadow['ansibulluser'][6] or getent_shadow['ansibulluser'][6] < 0
+  when: ansible_os_family in ['RedHat', 'Debian', 'Suse']
+
+- name: Verify un expiration date for linux/BSD
+  block:
+    - name: Unexpire user again to check for change
+      user:
+        name: ansibulluser
+        state: present
+        expires: -1
+      register: user_test_expires4
+
+    - name: Ensure first expiration reported a change and second did not
+      assert:
+        msg: The second run of the expiration removal task reported a change when it should not
+        that:
+          - user_test_expires3 is changed
+          - user_test_expires4 is not changed
+  when: ansible_os_family in ['RedHat', 'Debian', 'Suse', 'FreeBSD']
+
+- name: Verify un expiration date for BSD
+  block:
+    - name: BSD | Get expiration date for ansibulluser
+      shell: 'grep ansibulluser /etc/master.passwd | cut -d: -f 7'
+      changed_when: no
+      register: bsd_account_expiration
+
+    - name: BSD | Ensure proper expiration date was set
+      assert:
+        msg: "expiry is supposed to be '0', not {{bsd_account_expiration.stdout}}"
+        that:
+          - bsd_account_expiration.stdout == '0'
+  when: ansible_os_family == 'FreeBSD'