Bump Emacs version to 26.1.92

* README:
* configure.ac:
* msdos/sed2v2.inp:
* nt/README.W32: Bump Emacs version to 26.1.92.
1 job for emacs-26 in 29 minutes and 59 seconds (queued for 5 seconds)
Status Job ID Name Coverage
  Test
passed #871
test

00:29:59