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Even when they're constant, as is the case for zombie processes.

Pointed out by Michael Reed.

So that we can see errno. Pointed out by Michael Reed.

I forgot how awful the process name logic was. It was an initial hack to
get it running, and I forgot to clean it up.

I also had to change a few includes and error function uses.

OpenBSD port updates and error exit improvements

err.h functions corrupts the terminal when using curses.

Fix a case where the usertime calculation can overflow (see issue #202)

Darwin cpu average

add hint about system configuration file

Closes #293.

PPID and JID update fix

Fixed reparenting issue. PPID should be updated each refresh as any process can get reparented to either
PID1 or even any other PID (if there are custom reapers in the system).
Similar issue with jails, elevated process can ask kernel to attach itself into any jail at any time,
thus JID and jail name can change each refresh cycle.

https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man3/signal.3.html

Add OpenBSD signals

FreeBSD
Linux
Other platforms will have it undefined for now.

htop fails to compile with:

```text
SignalsPanel.c:32:49: error: use of undeclared identifier 'Platform_signals'
      Panel_set(this, i, (Object*) ListItem_new(Platform_signals[i].name, Platform_signals[i].number));
                                                ^
1 error generated.
*** Error code 1
```

Implementations for Linux (tested) and FreeBSD (still untested, thanks to @etosan for providing the table).
Darwin and OpenBSD(ping @mmcco) builds should be broken now, pending their own tables.

Cleanup and initial OpenBSD support

add editorconfig file to give hints to editors

We use an unusual indent of three spaces. Let's give editors a hint
about that.

Added preliminary attempt at jails support on FreeBSD - JID and JAIL (name) columns

Added preliminary attempt at jails support on FreeBSD - JID and JAIL (name) columns, somewhat more correct kernel "thread" detection.

Seems FreeBSD kernel can spawn both kernel processes (what is what htop currently sees) and kernel threads.
For now let's consider kernel processes kernel "threads".

Update htop.desktop (FR l10n)