Update out-of-date URLs in 'help' text of mysql client. (Bug #14801)

  if (help_arg)

    return com_server_help(buffer,line,help_arg+1);

  put_info("\nFor the complete MySQL Manual online, visit:\n   http://www.mysql.com/documentation\n", INFO_INFO);

  put_info("For info on technical support from MySQL developers, visit:\n   http://www.mysql.com/support\n", INFO_INFO);

  put_info("For info on MySQL books, utilities, consultants, etc., visit:\n   http://www.mysql.com/portal\n", INFO_INFO);

  put_info("\nFor information about MySQL products and services, visit:\n"

           "   http://www.mysql.com/\n"

           "For developer information, including the MySQL Reference Manual, "

           "visit:\n"

           "   http://dev.mysql.com/\n"

           "To buy MySQL Network Support, training, or other products, visit:\n"

           "   https://shop.mysql.com/\n", INFO_INFO);

  put_info("List of all MySQL commands:", INFO_INFO);

  if (!named_cmds)

    put_info("Note that all text commands must be first on line and end with ';'",INFO_INFO);