MFC r316339,317396,317829,326010,329554: less v530.

Relnotes: yes

MFC r293190: MFV r293125: less v481.

Relnotes: yes

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

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

Revert files with no local changes to their vendor state to ease future
upgrading.

MFV: less v451.

MFV: less v449.

MFV: Update to less v443.

MFC after: 1 month

Update less to v436. This is considered as a bugfix release from vendor.

Major changes from v429:
* Don't pass "-" to non-pipe LESSOPEN unless it starts with "-".
* Allow a fraction as the argument to the -# (--shift) option.
* Fix highlight bug when underlined/overstruck text matches at end of line.
* Fix non-regex searches with ctrl-R.

Approved by: re (kensmith, kib)

Update to less v429.

Make `less -R' not crash all the time.

Resolve conflicts; Update defines.h to reflect latest change.

Resolve conflicts to complete less v408 import.

Approved by: re (kensmith)

Resolve conflicts.

Resolve conflicts.

Fix a one byte off error which causes "less" to crash if you view a
large file, jump to the end, scroll backwards with "b" and try to search
backwards afterwards.

Submitted by: Matthias Scheler

This commit was generated by cvs2svn to compensate for changes in r128345,
which included commits to RCS files with non-trunk default branches.

Import less v381.

Import less v371

Import less v358.

Import the [now] dual licensed version 3.5.4 of less. It is
distributed under your choice of the GPL or a BSD style license.

Reviewed by: peter
Obtained from: http://home.flash.net/~marknu/less/