[dsc] DSC release 2.6.1

[Jerry Lundström]

Greetings all,

Compatibility fixes for FreeBSD 11.1+ which is now packing struct ip.

  https://www.dns-oarc.net/files/dsc/dsc-2.6.1.tar.gz
  e11019dc8cebd971bec420bb28dc97acc851dfd328c5d40bbf6b41df467db285

Packages are available at:

  https://dev.dns-oarc.net/packages/

Commits:
c0cd375 Handle compile warnings and FreeBSD's packing of structs
c528ccb Code formatting and moved external code to own directory

Cheers,
Jerry