Tidy up "services_unbound_acls.php" XHTML

Add "cloeahead" variable and manually close HEAD
Add CDATA sections to scripts
Close INPUT
Add SUMMARY to tables
Update HTML Boolean operators
Close IMG and add ALT
Remove empty TFOOT tag
Move TFOOT tag between THEAD and TBODY (quirk of HTML)
Add dummy table row, but don't display it
Add missing closing DIV and closing FORM
Merge pull request #1063 from ExolonDX/branch_master_19