[#432] Addressed review comments

- Typo in Changelog,
- Moved commentary a few lines up in CA command mgr,
- Added a note about relation between processCommand and handleCommand

ChangeLog

@@ -1,5 +1,5 @@
 1844.	[bug]		marcin
-	Corrected a bug in Kea Control Agent error responses when
+	Corrected a bug in Kea Control Agent error responses when a
 	malformed command was sent. In some cases a map with an error
 	response was returned instead of a list.
 	(Gitlab #432)

src/bin/agent/ca_command_mgr.cc

@@ -48,13 +48,12 @@ isc::data::ConstElementPtr
 CtrlAgentCommandMgr::processCommand(const isc::data::ConstElementPtr& cmd) {
     ConstElementPtr answer = HookedCommandMgr::processCommand(cmd);
 
-    if (answer->getType() == Element::list) {
-        return (answer);
-    }
-
     // Responses from the Kea Control Agent must be always wrapped
     // in a list because in general they contain responses from
     // multiple daemons.
+    if (answer->getType() == Element::list) {
+        return (answer);
+    }
     ElementPtr answer_list = Element::createList();
     answer_list->add(boost::const_pointer_cast<Element>(answer));
 

src/bin/agent/ca_command_mgr.h

@@ -51,6 +51,9 @@ public:
     /// error response must also be wrapped in a list because caller expects
     /// that CA always returns a list.
     ///
+    /// This method is an entry point for dealing with a command. Internally
+    /// it calls @c CtrlAgentCommandMgr::handleCommand.
+    ///
     /// @param cmd Pointer to the data element representing command in JSON
     /// format.
     /// @return Pointer to the response.

src/lib/config/base_command_mgr.h

@@ -115,6 +115,9 @@ public:
     /// This method is virtual so it can be overridden in derived classes to
     /// pre-process command and post-process response if necessary.
     ///
+    /// This method is an entry point for dealing with a command. Internally
+    /// it calls @c BaseCommandMgr::handleCommand.
+    ///
     /// @param cmd Pointer to the data element representing command in JSON
     /// format.
     virtual isc::data::ConstElementPtr