Handbook - Serial Port issues

[Jed Clear]

http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/serial.html does not
mention the new serial port device naming introduced recently (i.e. uart, ttyu,
cuau).  Section 26.2.2.2.2 Port Names is where these names are first mentioned. 
I skipped version 7, so don't know if a global replace is appropriate of if both
old and new names need to be mentioned until 7 is EOL.

Section 26.3.1.2 PCs Acting as Terminals mentions cu(1) and tip(1), but omit any
mention of what is needed to get them to work for normal users.  It looks like
two options are adding authorized users to the dialer group, or making cu(1) and
tip(1) setguid dialer to enable use for all users.  Might be worth adding this to
the man pages as well as the handbook.

-Jed