Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Remove the advertising clause from UCB copyrighted files in usr.bin. This
is in accordance with the information provided at
ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change

Also add $FreeBSD$ to a few files to keep svn happy.

Discussed with: imp, rwatson

ANSIfy function prototypes. While I am there, constify some parameters and
make use of C99 sparse initialization for static variables, this makes talk(1)
to compile cleanly with WARNS=6.

Do not attempt ro read more than sizeof(buf) from stdin.

Handle window resizing better.

Submitted by: Cyril Nguyen Huu
Obtained from: OpenBSD

Don't cast ioctl FIONREAD's argument to struct sgttyb *. This makes
no function changes, but removes an unnecessary reference to a
deprecated struct.

Obtained from: NetBSD (thorpej)

WARNS=2 fixes with NO_WERROR set because of system-header originating
warnings. Use __FBSDID().

Print the peer's name and address in the "Connection establish"
message. Similar information is given by the talk daemon when a
connection is requested, but that part isn't on the screen when the
main "talk" screen appears, and sometimes it's nice to know who you're
talking to.

Reviewed by: ru

Use STD{ERR,IN,OUT}_FILENO instead of their numeric values. The
definitions are more readable, and it's possible that they're
more portable to pathalogical platforms.

Submitted by: David Hill <david@phobia.ms>

Fix a bug when talking to non-freebsd machines where carriage return
was being interperated and displayed as ^M on the remote side.

Old curses used to change the behavior of the tty and how carriage
return was interperated via STDIN. ncurses does this on a per-window
basis within the library rather than using the tty modes. Since
talk is bypassing ncurses, it was missing the conversion.

Reviewed by: peter

talk depended on side effects of curses includes.

$Id$ -> $FreeBSD$

Remove couple of 'extern int errno'. (They turned to something funny when
<errno.h> included).

Add rcsid. Remove unused #includes (what about RU# ?). Change exit(-1) and
add usage().

Update some ancient warts in talk:
- use termios, not sgtty
- dont use _putchar(), that was a BSD-curses specific feature not in
other curses packages (such as ncurses)
- use sigaction, not sigvec while I'm there
- box() does different things under sysv/ncurses on 1-line high windows,
and BSD-curses doesn't have hline(), so do it by adding characters
instead. That works on both styles of curses.

Make talk automagically find out the interface IP address where the
remote peer will be connected through. This avoids the ``Checking for
invitation on caller's machine'' problem for multi-homed hosts.

Thanks to: Garrett, for his `find_interface' example

Remove trailing whitespace.

Don't allow talk own messages wrap around on the screen, just
scroll them like normal user input/output does.

This commit was generated by cvs2svn to compensate for changes in r1590,
which included commits to RCS files with non-trunk default branches.

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