systat(1): convert free(x); x = malloc(x * y) to reallocarr.

free on NULL is a guaranteed non-op.

fix wrong sysctl

use sysctl

Remove uarea swap-out functionality:

- Addresses the issue described in PR/38828.
- Some simplification in threading and sleepq subsystems.
- Eliminates pmap_collect() and, as a side note, allows pm

Remove uarea swap-out functionality:

- Addresses the issue described in PR/38828.
- Some simplification in threading and sleepq subsystems.
- Eliminates pmap_collect() and, as a side note, allows pmap optimisations.
- Eliminates XS_CTL_DATA_ONSTACK in scsipi code.
- Avoids few scans on LWP list and thus potentially long holds of proc_lock.
- Cuts ~1.5k lines of code. Reduces amd64 kernel size by ~4k.
- Removes __SWAP_BROKEN cases.

Tested on x86, mips, acorn32 (thanks <mpumford>) and partly tested on
acorn26 (thanks to <bjh21>).

Discussed on <tech-kern>, reviewed by <ad>.

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use c99 initializers
consistently terminate nlist arrays with NULL not ""

Appease gcc 4.x

WARNS=3

Uppercase CPU, plural is CPUs.

g/c SDEAD handling

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22365, verified by myself.

Create subwins that end one line from the bottom of the screen even
after the window is resized.

Merge the nathanw_sa branch.

Use kinfo_proc2.

Remove extern variables and functions now declared in dkstats.h.
While here, remove 77 (!) unneed #includes.

- Add `boot', `run', `time' and `zero' commands to all IP displays. These work
as in the `vmstat' display mode. The default mode is now `time', not `boot'.
- ANSIfy.
- s@kre\(@vmstat\(@.
- __RCSID(

- Add `boot', `run', `time' and `zero' commands to all IP displays. These work
as in the `vmstat' display mode. The default mode is now `time', not `boot'.
- ANSIfy.
- s@kre\(@vmstat\(@.
- __RCSID() police.
- Tweak inet.icmp display visual a little.

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Use hline() and variants in a bunch of places.

Use kern.cp_time to fetch cp_time[]. Don't support fetching it from
crash dumps yet, as that requires determining which CPU we should fetch
it from, etc.

include sys/sched.h to get definition of CPUSTATES

- implement layered help.
Suggested by: Andy Doran <ad@mr-magoo.sports.gov.uk>
- inet6.ip6 and ipsec menu
- u_quad_t printing fix
- #ifdefs to allow compilation on 1.4.x

Update for SDEAD.

Functional LP64 and type sanity fixes.

Add a new `ps' view to systat, which shows process information. This
view is identical to the output of `ps aux' except that a.) the RSS and VSZ
fields are one character wider and b.) it shows a zer

Add a new `ps' view to systat, which shows process information. This
view is identical to the output of `ps aux' except that a.) the RSS and VSZ
fields are one character wider and b.) it shows a zero value for the RSS
and %MEM columns of processes which report a negative RSS.

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Show pid as well as user name and command in pigs view. Makes hopping to
another window and killing the errant process (or even just distinguishing
it from like processes) rather easier.

const propagation.

- KNF
- use snprintf
- don't overwrite the keyboard buffer (and make this sized on
the window size).