Log Message:
i3: update to 4.20.1.

  • i3bar: fix crash with multiple monitors
  • xmlto: fix broken .TH line by extending title length
  • i3-msg: fix --raw short form (-r) in manpage
  • libi3: add missing sys/stat.h header
  • use getcwd(NULL, 0) instead of GNU extension get_current_dir_name()