extern void pod2text (const char *heading, const char *body);
extern void list_builtin_commands (void);
extern void display_builtin_command (const char *cmd);
extern void free_strings (char **argv);
extern void pod2text (const char *heading, const char *body);
extern void list_builtin_commands (void);
extern void display_builtin_command (const char *cmd);
extern void free_strings (char **argv);