Remove inconsistent behaviour of --default-* options in my_print_defaults

-e, -g and -c is only used by my_print_defaults. Also, in my_print_defaults, --defaults* option is recognized anywhere in the commandline vs only at the beginning in other tools. Hence, the aim is to make options for my_print_defaults consistent with other tools.
As a part of this patch, support for using -g, -e and -c in the options in removed.
Also, --default* option is now only recognized in the beginning.