docs/144127: termios(4) man page wrongly claims CCTS_OFLOW/CRTSCTS is unused

[G. Paul Ziemba]

>Number:         144127
>Category:       docs
>Synopsis:       termios(4) man page wrongly claims CCTS_OFLOW/CRTSCTS is unused
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-doc
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          doc-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Feb 20 09:40:01 UTC 2010
>Closed-Date:
>Last-Modified:
>Originator:     G. Paul Ziemba
>Release:        8.X
>Organization:
>Environment:
FreeBSD foo.ziemba.us 8.0-STABLE FreeBSD 8.0-STABLE #2: Fri Dec 11 16:36:37 PST 2009     root at hairball:/usr/obj/usr/src/sys/GPZ-091127  i386
>Description:
termios(4) says:
"The CCTS_OFLOW (CRTSCTS) flag is currently unused."

Yet code in /usr/src/sys/dev/uart/uart_tty.c references CCTS_OFLOW and as far as I know, it works. Hasn't it worked forever?
>How-To-Repeat:

>Fix:
Proposed replacement text:

    If CCTS_OFLOW (CRTSCTS) is set, transmission is stopped when CTS is lowered and resumed when CTS is raised.

Maybe similar treatment is warranted for CRTS_IFLOW?

>Release-Note:
>Audit-Trail:
>Unformatted: