Log Message:
gsed: update to 4.8.

* Noteworthy changes in release 4.8 (2020-01-14) [stable]

** Bug fixes

  "sed -i" now creates temporary files with correct umask (limited to \ 
u=rwx).
  Previously sed would incorrectly set umask on temporary files, resulting
  in problems under certain fuse-like file systems.
  [bug introduced in sed 4.2.1]

** Release

  distribute gzip-compressed tarballs once again

** Improvements

  a year's worth of gnulib development, including improved DFA performance