Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

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

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

- Sort the headers per style(9)

Reminded by: yar
Approved by: delphij (mentor, implicit)

- Fix crash with ncurses on FreeBSD/amd64 CURRENT by including missing
header <term.h>, which is required by both tputs() and tgoto().

Without this header, nvi crashes with the call to tputs() at line 114.
This is because the first argument of tputs() is a pointer, and the
returned pointer from tgoto() is casted to an integer by compiler.

For some reasons, this only crashes on amd64+CURRENT. On 6.x system,
this does not happen.

PR: 101248
Reported by: yar, infofarmer, Roland Smith
Tested by: infofarmer, delphij, rafan
Approved by: delphij (mentor)

o nvi failed to correctly handle EINTR returned from tcsetattr(), exiting
instead of recovering, which happens in particular during a rapid series
of SIGWINCH's. This change forces nvi to loop on the call in the event
that the call is interrupted.

Interestingly, I submitted this bug report in 1998, and a solution was
posted shortly thereafter by Matthias Buelow; it's been sitting in the
PR database ever since.

Note: this takes this file off the vendor branch. If and when we find
a vendor for this code, the fix should be given back to them.

PR: bin/8438
Submitted by: Matthias Buelow <mkb@altair.mayn.de>
MFC after: 1 month

This commit was generated by cvs2svn to compensate for changes in r69482,
which included commits to RCS files with non-trunk default branches.

This commit was generated by cvs2svn to compensate for changes in r19304,
which included commits to RCS files with non-trunk default branches.