master updated (69223ee975 -> 7feb5b2da7)

[Mattias Engdegård]

mattiase pushed a change to branch master.

      from  69223ee975 Delete obsolete variable gnus-secondary-servers
       new  eb0e93478e Transform (list) -> nil in source optimiser
       new  d1ac1b2108 Improved cons optimisation
       new  7feb5b2da7 Optimise `append` calls


Summary of changes:
 lisp/emacs-lisp/byte-opt.el | 96 ++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 91 insertions(+), 5 deletions(-)