[NEW] Option -f and command destroy are added to portsreinstall-chroot.

[NEW] Option -f and command destroy are added to portsreinstall-chroot.

[NEW] Option -j is added.

 Changes to be committed:
	modified:   lib/chroot/libcommand.sh
	modified:   lib/chroot/libcommand_do.sh
	modified:   lib/chroot/libdatabase_maintain.sh
	modified:   lib/chroot/liboptions.sh
	modified:   lib/chroot/libusage.sh
	modified:   lib/libcommand_do.sh
	modified:   lib/main/liboptions.sh
	modified:   lib/main/libusage.sh
	modified:   man/portsreinstall-chroot.8
	modified:   man/portsreinstall.8
	modified:   lib/libmain.sh