Clarify nesting of tls_bind_port
Clarify nesting of tls_bind_port

The original documentation implied that "tls_bind_port" lived on the same level as "vm_type" or "vm_extensions".

Also, removed extra <hr>
pivotal-cf-experimental/bosh-bootloader,pivotal-cf-experimental/bosh-bootloader,niroyb/bosh-bootloader,niroyb/bosh-bootloader