pfSense

Use proper interface for reply-to in case of 6rd/6to4

Remove useless function calls

Unset the ip from the cache to retrieve the right ip

Correct get_interface_subnetv6 and use get_interface_ipv6 during dhcp config generation. Also initialize some arrays to avoid warnings

If gatway is dynamic the type cannot be determined, trim the code trying to do something impossible. While here optimize a bit

Try to remove as much as possible _stf special case through the code

Do a check of interface existing

Use the new functionality on get_real_interface to get the _stf interface when needed

Use get_interface_ipv6 on rc.newwanipv6 to and teach it to flush the cache on optional parameter. Also teach get_real_interface about the tedios ipv6 tunnel interfaces and return them when ipv6 family is specified

Avoid trying to remove an invalid IP