pfSense

Use UPDATES_TARBALL_FILENAME to get file name

Use cp -l to create hardlinks instead of duplicating images

Simplify logic and check if file exist before try to copy it

Create a latest symlink for all images but nanobsd, that already have one

Revert "remove the destination server's interface(s) from dhcrelay. Ticket #4908"

This reverts commit f791f28d6794c3b0601259f0de7acdebf6a367a8

Move kill tail process to _exit()

Auto-add firewall rules for DHCP Relay, same as is done for DHCP Server. Add filter reload to DHCP Relay config so rules are immediately added/removed. Ticket #4558

fix typo, spotted by Phil Davis

fix typo

pfSense-upgrade revised to kill tail on exit
pkg_mgr_install.php revised to catch json deocde error on partial lines read from file