Add missing port NAT configuration

Missing port translation causes last line to fail

Docker-DCO-1.1-Signed-off-by: James Fisher <jameshfisher@gmail.com> (github: jameshfisher)
Fix daemon's documentation for -bip flag
Merge pull request #4887 from jameshfisher/nat

Add missing port NAT configuration
Merge pull request #4900 from WarheadsSE/fix-bip-docs

Fix daemon's documentation for -bip flag