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

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

MFC 237646,237656,238020:
- Add a new line to top that provides a brief summary of the ZFS ARC memory
usage on hosts using ZFS. The new line displays the total amount of RAM
used by the ARC along with the size of MFU, MRU, anonymous (in flight),
headers, and other (miscellaneous) sub-categories. The line is not
displayed on systems that are not using ZFS.
- Clarify that the cached file data pages included in the "Wired" count
in top are the BIO-level cached data (i.e. "Buf"), since the previous
phrase was a bit ambiguous with the "Cache" count.

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

Approved by: re (implicit)

Rework the dynamic per-CPU stats code a bit. Always set 'statics->ncpus'
to the maximum number of CPUs to ensure that lcpustates[] array is always
allocated to the maximum size. Previously, if top was started without
per-CPU stats it would allocate a smaller lcpustates[] array. When
per-CPU stats were then enabled, it would overflow the array and trash
the cpustates_columns[] array causing the CPU stats to be printed in the
wrong locations.

Approved by: re (kib)
MFC after: 1 week

Allow per-CPU statistics to be toggled at runtime via the 'P' key.
While here, make -P a toggle similar to other options such as -I.

Reviewed by: arundel
MFC after: 1 week

Revert r214857 pursudant to 9.0-RELEASE cycle.

Requested by: jh

Output an appropriate amount of padding to line up per-CPU state columns
rather than using a terminal sequence to move the cursor when drawing the
initial screen.

Requested by: arundel
MFC after: 3 days

Inverse display of top(1)'s table header when running in inactive mode.

MFC after: 2 weeks

Since top displays the uptime including seconds, there is no need to add 30
onto it, which may have been used for rounding purposes in other utilities.

PR: bin/147934
Submitted by: Janne Snabb <snabb at epipe.com>
Approved by: rrs (mentor)
MFC after: 2 weeks

Explicitly line up the CPU state labels with the calculated starting column
that takes into account the width of the largest CPU ID. On systems with
> 10 CPUs the labels for the first 10 CPUs were not lined up properly
otherwise.

Approved by: re (kib)
MFC after: 1 week

Add a -P flag to display per-cpu cpu usage stats.

The 'text' argument of u_header() is not used, so we don't need to
trim_header() it.

Noticed by: bde

Properly trim the header line too, to fix wrap-around problems that
have been noticed by running top(1) in terminals that are too narrow
(or on systems with usernames that were too long, pushing everything
too far to the right).

Note that this does *not* solve the wrap-around problem of the system
statistics, which is an entirely different matter :-/

Tested on: i386, sparc64 (panther), amd64 (sledge)
Approved by: davidxu (in principle)

Fix a bug where you couldn't start top in a very small window. Now
you can start it in a small window, but it doesn't always display
anything sensible. Resizing the window does work though.

The patch is a slightly simpler one than Sheldon's in the PR.

PR: 21075

Resolve conflicts.

display.c: sprintf -> snprintf
top.c: fix from NetBSD/OpenBSD: make sure that new_message() is called
with a format.

Add $FreeBSD$ While I'm here.

These files are already off the vendor branch.

uptime display more in style with original code

Display uptime in upper right corner.

Submitted by: Andy Farkas <andyf@speednet.com.au>
Obtained from: freebsd-current list

Apply the FreeBSD-local patches.

Obtained from: The ports collection.

This commit was generated by cvs2svn to compensate for changes in r24139,
which included commits to RCS files with non-trunk default branches.

This is the long-awaited import of top into the base system (actually,
the src/contrib/top part right now). This tools is simply too system-
dependant to maintain it in the ports collection.