Package check result: NOTE

Check: CRAN incoming feasibility, Result: NOTE
  Maintainer: ‘Martin Papenberg <martin.papenberg@hhu.de>’
  
  Suggests or Enhances not in mainstream repositories:
    gurobi
  
  Found the following (possibly) invalid URLs:
    URL: https://www.gnu.org/software/glpk/glpk.html
      From: DESCRIPTION
      Status: Error
      Message: Could not connect to server [www.gnu.org]:
        Failed to connect to www.gnu.org:443 after 102 ms: Could not connect to server

Check: examples, Result: NOTE
  Examples with CPU (user + system) or elapsed time > 5s
                        user system elapsed
  kplus_anticlustering 6.028  0.004   6.033

No changes to worse in reverse depends.