[faiproject/fai] fe95a1: disable ssl:verify-certificate for lftp, use curl ...

[Mrfai]

  Branch: refs/heads/master
  Home:   https://github.com/faiproject/fai
  Commit: fe95a15cf58efd3838dee20a6efd256a87ab9854
      https://github.com/faiproject/fai/commit/fe95a15cf58efd3838dee20a6efd256a87ab9854
  Author: Thomas Lange <lange at debian.org>
  Date:   2022-05-28 (Sat, 28 May 2022)

  Changed paths:
    M lib/fetch-basefile

  Log Message:
  -----------
  disable ssl:verify-certificate for lftp, use curl for downloading, so https can be used