Patch by Robert Scheck <robert@fedoraproject.org> for iftop >= 0.17, which works
around a PuTTY issue (doesn't honor vt100 line-drawing when in UTF-8 mode) to get
sane lines drawn instead of letters. When using PuTTY in UTF-8 mode, you have to
execute "NCURSES_NO_UTF8_ACS=1 iftop" in the future. Technically, relinking from
curses to ncursesw is just half of the solution, calling setlocale() is the rest.
For further information, please have a look to Red Hat Bugzilla, bug ID #546032:
https://bugzilla.redhat.com/show_bug.cgi?id=546032

--- iftop-0.17/configure.in			2006-02-12 19:34:24.000000000 +0100
+++ iftop-0.17/configure.in.ncursesw		2010-04-01 15:12:36.000000000 +0200
@@ -352,7 +352,7 @@
 
 AC_MSG_CHECKING([for a curses library containing mvchgat])
 oldLIBS=$LIBS
-for curseslib in curses ncurses ; do
+for curseslib in ncursesw curses ncurses ; do
     LIBS="$oldLIBS -l$curseslib"
     AC_TRY_LINK([
 #include <curses.h>
--- iftop-0.17/iftop.c				2005-03-31 14:08:05.000000000 +0200
+++ iftop-0.17/iftop.c.ncursesw			2010-04-01 15:11:50.000000000 +0200
@@ -25,6 +25,7 @@
 #include <signal.h>
 #include <string.h>
 #include <unistd.h>
+#include <locale.h>
 
 #include "iftop.h"
 #include "addr_hash.h"
@@ -563,6 +564,8 @@
     pthread_t thread;
     struct sigaction sa = {};
 
+    setlocale(LC_ALL, "");
+
     /* TODO: tidy this up */
     /* read command line options and config file */   
     config_init();