Log Message:
Update to 0.41.0

  FIX: Do not use packages with non-empry PKG_FAIL_REASON for building
  a dependency graph if there are ones without such marker. This
  unbreaks rare failures of bulk builds.

  Changes in dependency graph generation. Old algorithm leads to too
  many failures caused by weak [BUILD_]DEPENDS in pkgsrc. Old
  algorithm is available using "distbb -m1".

  rmd160 and sha512 checksums are generated for packages in pkg_summary(5).

  A number of sanity checks and tips for packagers have been
  implemented which are a part of final report.

  stage_report has been renamed to stage_send_report

  New script pkg_summary2build_deps for building dependency graph