Mega-commit with features and tweaks for 1.0:

* Performance improvements
* Support for splitting CPU meters into two or four columns
  (thanks to Wim Heirman)
* Switch from PLPA, which is now deprecated, to HWLOC.
* Bring back support for native Linux sched_setaffinity,
  so we don't have to use HWLOC where we don't need to.
* Support for typing in user names and column fields in selection panels.

htop.c

@@ -193,44 +193,11 @@ static bool changePriority(Panel* panel, int delta) {
    return anyTagged;
 }
 
-static HandlerResult pickWithEnter(Panel* panel, int ch) {
-   int size = Panel_size(panel);
- 
-   if (isalnum(ch)) {
-      int len = strlen(panel->eventHandlerBuffer);
-      if (len < 99) {
-         panel->eventHandlerBuffer[len] = ch;
-         panel->eventHandlerBuffer[len+1] = '\0';
-      }
-      for (int try = 0; try < 2; try++) {
-         len = strlen(panel->eventHandlerBuffer);
-         for (int i = 0; i < size; i++) {
-            char* cur = ((ListItem*) Panel_get(panel, i))->value;
-            while (*cur == ' ') cur++;
-            if (strncasecmp(cur, panel->eventHandlerBuffer, len) == 0) {
-               Panel_setSelected(panel, i);
-               return HANDLED;
-            }
-         }
-         panel->eventHandlerBuffer[0] = ch;
-         panel->eventHandlerBuffer[1] = '\0';
-      }
-      return HANDLED;
-   } else if (ch != ERR) {
-      panel->eventHandlerBuffer[0] = '\0';
-   }
-   if (ch == 13) {
-      return BREAK_LOOP;
-   }
-   return IGNORED;
-}
-
 static Object* pickFromVector(Panel* panel, Panel* list, int x, int y, const char** keyLabels, FunctionBar* prevBar, Header* header) {
    const char* fuKeys[] = {"Enter", "Esc", NULL};
    int fuEvents[] = {13, 27};
-   list->eventHandlerBuffer = calloc(100, 1);
    if (!list->eventHandler)
-      Panel_setEventHandler(list, pickWithEnter);
+      Panel_setEventHandler(list, Panel_selectByTyping);
    ScreenManager* scr = ScreenManager_new(0, y, 0, -1, HORIZONTAL, header, false);
    ScreenManager_add(scr, list, FunctionBar_new(keyLabels, fuKeys, fuEvents), x - 1);
    ScreenManager_add(scr, panel, NULL, -1);
@@ -238,8 +205,6 @@ static Object* pickFromVector(Panel* panel, Panel* list, int x, int y, const cha
    int ch;
    ScreenManager_run(scr, &panelFocus, &ch);
    ScreenManager_delete(scr);
-   free(list->eventHandlerBuffer);
-   list->eventHandlerBuffer = NULL;
    Panel_move(panel, 0, y);
    Panel_resize(panel, COLS, LINES-y-1);
    FunctionBar_draw(prevBar, NULL);
@@ -383,7 +348,7 @@ int main(int argc, char** argv) {
    Process_getMaxPid();
    
    Header* header = Header_new(pl);
-   settings = Settings_new(pl, header);
+   settings = Settings_new(pl, header, pl->cpuCount);
    int headerHeight = Header_calculateHeight(header);
 
    // FIXME: move delay code to settings
@@ -750,7 +715,7 @@ int main(int argc, char** argv) {
          Panel* usersPanel = Panel_new(0, 0, 0, 0, LISTITEM_CLASS, true, ListItem_compare);
          Panel_setHeader(usersPanel, "Show processes of:");
          UsersTable_foreach(ut, addUserToVector, usersPanel);
-         Vector_sort(usersPanel->items);
+         Vector_insertionSort(usersPanel->items);
          ListItem* allUsers = ListItem_new("All users", -1);
          Panel_insert(usersPanel, 0, (Object*) allUsers);
          const char* fuFunctions[] = {"Show    ", "Cancel ", NULL};
@@ -808,7 +773,7 @@ int main(int argc, char** argv) {
          refreshTimeout = 0;
          break;
       }
-#ifdef HAVE_HWLOC
+#if (HAVE_HWLOC || HAVE_NATIVE_AFFINITY)
       case 'a':
       {
          if (pl->cpuCount == 1)