pfSense

Make sense of interface mtu handling code. No need to do unneeded operations. This fixes slow boot times and proper handling of mtu for vlans though some work or better model is needed for other interface types.

Delete static route when monitor IP is removed, also save monitor IP even when it's disabled

When WANTIME is empty, there is nothing to do here

test only does integer comparison, use bc to compare float

Save status even if no script is executed

On first run REVIOUSSTATUS doesn't exist, so it cannot be UP or DOWN, invert the logic to fix this. While I'm here, check if file exists before cat it

Fix DHCP lease time display, strftime already convert it to local timezone, so we no need to calc offset

Remove 'deny unknown clients' option from DHCPv6 since it's not supported, it fixes #3364

Avoid dashboard divide by zero errors

Fix saving of voucher sync settings.