- Copy stable/10 (r259064) to releng/10.0 as part of the
10.0-RELEASE cycle.
- Update __FreeBSD_version [1]
- Set branch name to -RC1

[1] 10.0-CURRENT __FreeBSD_version value ended at '55', so
start releng/10.0 at '100' so the branch is started with
a value ending in zero.

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

Note that the manual page of less(1) says:

Note that a preprocessor cannot output an empty file, since that
is interpreted as meaning there is no replacement, and the origi-
nal file is used. To avoid this, if LESSOPEN starts with two ver-
tical bars, the exit status of the script becomes meaningful. If
the exit status is zero, the output is considered to be replace-
ment text, even if it empty. If the exit status is nonzero, any
output is ignored and the original file is used. For compatibil-
ity with previous versions of less, if LESSOPEN starts with only
one vertical bar, the exit status of the preprocessor is ignored.

Use two pipe symbols for zless, so that zless'ing a compressed empty
file will give output rather than being interpreted as its compressed
form, which is typically a binary.

Thanks Mark Nudelman for pointing out this difference and the
suggested solution.

Reported by: Matthias Meyser <meyser xenet.de>
PR: bin/168839
MFC after: 2 weeks

Fix build with clang: properly terminate comment even in #if 0 blocks.

Submitted by: dim

MFV: less v453.

MFV: less v449.

Regenerated with latest configure script.

MFC after: 1 month

Import of liblzma, xz, xzdec, lzmainfo from vendor branch
Add support for xz and lzma to lesspipe.sh (xzless, lzless)
Bump __FreeBSD_version

Approved by: delphij (mentor)
MFC after: 2 weeks

Build usr.bin/ with WARNS=6 by default.

Also add some missing $FreeBSD$ to keep svn happy.

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)

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

Regen.

Fix handling of filenames containing whitespace.

PR: bin/112860
MFC in: 3 days

In rev. 1.2 we have introduced a fallback handler for files with unknown
extensions. This seems to be unnecessary and prevents less(1) from being
able to detect file changes, so remove the part.

Submitted by: Eric Huss <e-huss netmeridian com>
PR: bin/102624
Discussed with: des
MFC After: 3 days

Regen.

Correct the script name to be "zless.sh". This avoids an extra cp/chmod
(from the sys.mk rule) while still installing it under the "zless" name.

Add a zless script which invokes less using the lesspipe script. This is
similar to the zmore script that comes with gzip (and in fact, in most
Linux distros, zless is a symlink to that very same zmore script) but has
the advantage that you get the correct file name on the less status line,
and can use :n and :p to navigate back and forth between multiple files.

MFC after: 1 week

Handle presumably uncompressed files with cat; exec the handlers.

MFC after: 1 week

Restore old value of LESSKEYFILE_SYS.

Regenerate with less 381 configure script.

Use
cat ${.ALLSRC} > ${.TARGET}
rather than
ln -sf ${.ALLSRC} ${.TARGET}
not to depends on absolute-path of symbolic links.

Commented by: marcel, obrien, bde

Add an embellished lesspipe.sh as described in the man page.
P.S. it is stupid I have to define both SCRIPTS and SCRIPTSNAME.

Use ${BINDIR} instead of hardcoded path.

PR: 44582
Submitted by: Jon Disnard <jon.disnard@ca.com>
Reviewed by: ru
MFC after: 3 weeks

Update for less v371

MAN[1-9] -> MAN.

ncurses -> termcap

Upgrade to less v358.

Fixed some style bugs. Apart from formatting bugs, MANDEPEND is deprecated
and $< and $@ are even documented as deprecated.

Install a manpage for more.

Detach usr.bin/more and install a link from less. less will behave
like more if invoked as more. The old more has not been removed.

Dont use/install the formatted man file.

bmake glue for less.

Reviewed by: peter