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Real fix for issue #438.

Closes #438.

Thank you @Explorer09 for the push!
Closes #417.

Fixes building on case-insensitive filesystems where String.h gets confused with <string.h>.

From d734dacea0a10d0465dad4e95b3421511e7da112 Mon Sep 17 00:00:00 2001
From: David Hunt <dhunt@iolanthe.attlocal.net>
Date: Sat, 11 Jul 2015 20:56:31 -0500
Subject: [PATCH 1/8] Rename String to StringUtils

htop uses scanf functions to parse values from proc filesystem. This
breaks when initializing locale for LC_NUMERIC because of unexpected
commas. So initialize locale for LC_CTYPE only.

This has two effects:

* The locale may have impact on string formatting. So depending on the
  locale we may end up with different decimal point.
* We can use nl_langinfo() for UTF-8 detection.

... and thus make it use a different color than PROCESS_HIGH_PRIORITY.

in ncurses. CPU usage goes down noticeably.
(Also, add missing comma, sorry.)

This is a work-in-progress, code is currently broken.
(Some actions, and notably, the header, are missing.)

Changes in object model: separate class objects to store vtable. Also, nicer UTF-8 display of big numbers.

(thanks to Philipp Hagemeister)