RDR Improvements: Allow TO/FROM+INTERACE+IP STACK

[tschettervictor]

I've reconstructed much of the rdr.sh to allow users to set TO/FROM and also the interface.
Old command of bastille rdr jail tcp 8000 80 still functions as it should and will use the default interface and any to any when creating the rules. Major differences are

• you can now set which interface the rule is created on with -i em0 or any specified interface
• if you want to limit the rdr rule to a certain source, use -s 134.234.67.34
• if you have multiple IPs on an interface, you can choose to redirect to only one using -d 192.168.1.45
• -t is also available if you want to specifically load a rule doing ip4/6 -t ipv4 or -t ipv6. The default will use both, or 'dual'

Error checking is also in place, and testers are welcome.
I will continue to update this PR with the docs and usage commands if users find this helpful.

[tschettervictor]

I've reconstructed much of the rdr.sh to allow users to set TO/FROM and also the interface.
Old command of bastille rdr jail tcp 8000 80 still functions as it should and will use the default interface and any to any when creating the rules. Major differences are

• you can now set which interface the rule is created on with -i em0 or any specified interface
• if you want to limit the rdr rule to a certain source, use -s 134.234.67.34
• if you have multiple IPs on an interface, you can choose to redirect to only one using -d 192.168.1.45

Error checking is also in place, and testers are welcome.
I will continue to update this PR with the docs and usage commands if users find this helpful.

#707
#673
#664
#654
#644
#402

[tschettervictor]

RDR will now show errors for any rule that failed to create.
It also will now print better info when redirecting IPv4/6 rules.

[tschettervictor]

@yaazkal @bmac2 I think this should do it. Can I request a review?

This PR allows very high functionality and would allow us to close many issues and PRs.

And I've tested most if not all combinations of options and made sure error catching is good as well as IPv4 and IPv6 handling.

Thanks

[bmac2]

@tschettervictor this one has conflicts. I was going to start testing but need it cleanedup then I will start testing.

[tschettervictor]

Done.

[tschettervictor]

Any testers for this one?