Parameter size mismatch between client and VM sides of the Attach API

In the VM the attach logic sets limits on the number and types of arguments that can be received:

class AttachOperation: public CHeapObj<mtInternal> {
 public:
  enum {
    name_length_max = 16, // maximum length of name
    arg_length_max = 1024, // maximum length of argument
    arg_count_max = 4 // maximum number of arguments
  };

but the client tools that send these requests may include arbitrary length arguments, such as filenames, that might exceed these limits.