reference: check for prefix instead of splitting, and use consts
reference: check for prefix instead of splitting, and use consts

- use strings.HasPrefix() to check for the prefix we're interested in instead
  of doing a strings.Split() without limits. This makes the code both easier
  to read, and prevents potential situations where we end up with a long slice.
- use consts for defaults; these should never be modified, so better to use
  consts for them to indicate they're fixed values.

Signed-off-by: Sebastiaan van Stijn <64b2b6d12bfe4baae7dad3d018f8cbf6b0e7a044@gone.nl>

thaJeztah/distribution,thaJeztah/distribution