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Rename variable for consistency

Suggested by Hisham.

align help output

Plug mem leak, improve CPU enumeration logic

These are never necessary when using the standard library.

I think this leak may still exist in the FreeBSD port.

Should fix #321.

OpenBSD fixes and updates

Fix spelling of "maintainer"

This is what OpenBSD's top(1) does when the libkvm call fails, and it's
a good idea.

This commit also fixes process name construction. The space was being
written one character too far.

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.

major meters update

Fix text on function bar when moving meters.

Before:
[Up]Up [Dn]Down [Lt]Left [Rt]Right [Arrow]Confirm [Enter]Delete [Del]Done

After:
[Up]Up [Dn]Down [Lt]Left [Rt]Right [Enter]Confirm [Del]Delete [Esc]Done

this caused htop to show processes as if freebsd kernel was their parent.
on next pass reparenting code took chance to run, and that caused process to jump around.
this fixed behaviour should be the correct one

Apparently a line longer than 255 chars was spotted in the wild:
http://serverfault.com/questions/577939/linux-ps-htop-show-processes-running-for-hundreds-or-thousands-of-days-though-h#comment676098_577939

Redraw the panel when resizing the window during an incremental search

KEY_RESIZE wasn't handled by the incremental search. Resulting in this
bug:

  * Set your terminal window to a small size.
  * Press '\' to filter the processes
  * Maximize your terminal window
  * The list of processes didn't resize.

This change fixes this bug.

Thank you Julian Andrews (@julianandrews) for finding this bug.

See #198.

when testing for ncurses library. See #198.

Update calculation of used vs. free memory.

Ensure that all necessary libs and flags are passed along,
such as adding -ltinfo when needed.

Closes #198.