Update "pkg_edit.php"

Move closing TR tag outside, otherwise the 'foreach' statement will
produce a duplicate closing TR tag.
Merge pull request #622 from ExolonDX/branch_10

Update "pkg_edit.php"
Disable udp checksums by default
Fix dnsmasq host overrides 'enabled' check.
Merge pull request #624 from PiBa-NL/dns_hostoverride_fix

Fix dnsmasq host overrides 'enabled' check.