Make command warnings off by default to minimize surprises.

commands/command

@@ -71,10 +71,9 @@ options:
     version_added: "1.8"
     default: yes
     description:
-      - "turn off warnings about running a command that is provided by an Ansible module, suggesting you should use that module instead. 'Command warnings' can also be turned off globally in ansible.cfg"
+      - if command warnings are on in ansible.cfg, do not warn about this particular line if set to no/false.
     required: false
     default: True
-    version_added: "1.5"
 notes:
     -  If you want to run a command through the shell (say you are using C(<),
        C(>), C(|), etc), you actually want the M(shell) module instead. The

commands/shell

@@ -43,10 +43,10 @@ options:
     version_added: "0.9"
   warn:
     description:
-      - turn off warnings about running a command that is provided by an Ansible module.
+      - if command warnings are on in ansible.cfg, do not warn about this particular line if set to no/false.
     required: false
     default: True
-    version_added: "1.5"
+    version_added: "1.8"
 notes:
    -  If you want to execute a command securely and predictably, it may be
       better to use the M(command) module instead. Best practices when writing