**Added:** None

**Changed:**

* The following commands are, by deafult, predicted to be not backgroundable
  in some circumastances:

    * bash
    * csh
    * clear
    * cls
    * fish
    * ksh
    * less
    * man
    * more
    * sh
    * ssh
    * startx
    * sudo
    * tcsh
    * top
    * vi
    * vim
    * vimpager
    * xo
    * xonsh
    * zsh

**Deprecated:** None

**Removed:** None

**Fixed:** None

**Security:** None