Argument Parsing

- Obsoleted Command::exectute  'commandLine' argument.  It is worse
  than unnecessary, it is an uncategorized raw argument string, which
  is only really useful for the 'execute' command, which itself now
  calls Arguments::combine to reconstruct the command line string.

src/commands/CmdPush.cpp

@@ -48,7 +48,7 @@ CmdPush::CmdPush ()
 ////////////////////////////////////////////////////////////////////////////////
 // Transfers the local data (from rc.location.data) to the remote path.  Because
 // this is potentially on another machine, no checking can be performed.
-int CmdPush::execute (const std::string&, std::string& output)
+int CmdPush::execute (std::string& output)
 {
   std::string file = trim (context.task.get ("description"));