Embedded TCP/IP stack: fnet_shell_command::syntax

Syntax of the command (null-terminated string).
This field is used by the fnet_shell_help() function. The standard command line syntax information which will be helpful to describe the possible command line parameters in a help display is:

• [] = When a parameter is surrounded with square brackets, this means the parameter is optional.
• <> = When a parameter is surrounded with angle brackets, this means the parameter is required for normal operations of command.
• | = The vertical bar means a choice between parameter value is acceptable.