[NEW] auto command is added to portsreinstall-chroot(8).

[NEW] auto command is added to portsreinstall-chroot(8).

 Changes to be committed:
	modified:   bin/portsreinstall
	modified:   bin/portsreinstall-chroot
	modified:   lib/chroot/libcommand.sh
	modified:   lib/chroot/libcommand_do.sh
	modified:   lib/chroot/libusage.sh
	modified:   lib/libdatabase_maintain.sh
	modified:   lib/libfs.sh
	modified:   lib/libmain.sh
	modified:   man/portsreinstall-chroot.8
	modified:   man/portsreinstall.8
	modified:   share/bin/portsreinstall-chroot-mount
	modified:   share/bin/portsreinstall-upgrade