GNU=http://www.gnu.org/software
READLINE=${GNU}/readline/manual
readline	mono	${READLINE}/readline.html
readline	node	${READLINE}/html_node/
readline	section	${READLINE}/html_section/
readline	chapter	${READLINE}/html_chapter/

open(2)		mono	https://man.gnu.org.ua/2/open
stat(2)		mono	https://man.gnu.org.ua/2/stat
chmod(2)	mono	https://man.gnu.org.ua/2/chmod
printf(3)	mono	https://man.gnu.org.ua/3/printf