[fvwmorg/fvwm] 4df413: README: clarifications and typo fixes

[Thomas Adam]

  Branch: refs/heads/master
  Home:   https://github.com/fvwmorg/fvwm
  Commit: 4df413509888555d063a7cb12c9f899e8712acd3
      
https://github.com/fvwmorg/fvwm/commit/4df413509888555d063a7cb12c9f899e8712acd3
  Author: Thomas Adam <tho...@xteddy.org>
  Date:   2019-08-25 (Sun, 25 Aug 2019)

  Changed paths:
    M README.md

  Log Message:
  -----------
  README: clarifications and typo fixes