modules: readme files regenerated - cfg_rpc ... [skip ci]

src/modules/cfg_rpc/README

@@ -147,12 +147,15 @@ Chapter 1. Admin Guide
 3.2. cfg.get
 
    cfg.get - Get the value of a configuration variable. The function
-   accepts two parameters: group name, variable name. The group name can
-   optionally contain the group instance id, for example foo[5].
+   accepts two parameters: group name, variable name, but if all the
+   elements belonging to a certain group is wanted to be retrieved then
+   only the group name would suffice as the function parameter. The group
+   name can optionally contain the group instance id, for example foo[5].
 
    Example 1.2. Use cfg.get RPC command
 ...
 # kamcmd cfg.get core debug
+# kamcmd cfg.get tm
 ...
 
 3.3. cfg.seti