Resolve "Unable to build Debian packages using the content in this repo"

Closes #8 (closed).

• 2d498654 remove unused patches in debian and update patch in alpine

  The changes to the alpine patch are:

  • Add command to generate the patch which can be tricky as you need to get rid of index and diff commands for each file which cannot be done with git alone.
  • Update line references, which is effectively what makes the patch apply to sources again.
  • Put as little context as possible around the change to minimize possibility of patch not applying, courtesy of the -U1 flag.
  • Keep the same socket name as in the sources.

• https://jenkins.aws.isc.org/job/kea-manual/job/pkg/416/