[kalgebra/f20] (9 commits) ...Merge branch 'master' into f20

[Rex Dieter]

Summary of changes:

  e75ab0a... 4.11.90 (*)
  791c2c1... 4.11.95 (*)
  8324601... 4.11.97 (*)
  9c47c1d... 4.12.0 (*)
  91959a3... 4.12.1 (*)
  0ffaad0... 4.12.2 (*)
  fda3fea... Revert "4.11.5"
  948ab4f... Revert "4.11.4"
  95a7fbd... Merge branch 'master' into f20

(*) This commit already existed in another branch; no separate mail sent