The .FLAGS ACCEPT and .NO FLAGS ACCEPT commands turn on and turn
    off recognition of the Accept flag character (_).

    Formats

      .FLAGS ACCEPT  [k]

      .NO FLAGS ACCEPT

    Abreviated formats

      .FL ACCEPT  [k]

      .NFL ACCEPT

1  –  Parameter

 k

    Specifies a character to replace the current flag character.

2  –  Default

    .FLAGS ACCEPT - Recognition of the Accept flag character (_) is
    turned on.