blob: Simplify stdin_command().

blob: Simplify stdin_command().

This function has only a single caller which passes a pointer to
afs_cb_result_handler() as the result handler. Also the first and
last parameter are both pointers to the command_context structure.

This commit gets rid of the two arguments of the function and updates
the documentation accordingly. Since it is a static function, we
don't need doxygen comments for all arguments.