Clarify naming of extra configuration files

Author: priteau

ansible/roles/sshd/tasks/configure.yml

@@ -10,12 +10,13 @@
     mode: 700
   become: true
 
-- name: Ensure drop in directory is included
+- name: Ensure drop in configuration is included
   blockinfile:
     dest: /etc/ssh/sshd_config
-    content: | 
-      # To modify the system-wide sshd configuration, create a  *.conf  file under
-      #  /etc/ssh/sshd_config.d/  which will be automatically included below
+    content: |
+      # To modify the system-wide sshd configuration, create <custom>.conf
+      # files under /etc/ssh/sshd_config.d/ which will be automatically
+      # included below.
       Include /etc/ssh/sshd_config.d/*.conf
     state: present
     insertafter: "# default value."