added cpu() virtualization, flags

docs/filesystem.html

@@ -259,13 +259,13 @@ si.diskLayout().then(data => console.log(data));</code></pre class="example">
     name: 'SAMSUNG xxxxxxxxxxxx-xxxx',
     vendor: 'Samsung',
     size: 1024209543168,
-    bytesPerSector: -1,
-    totalCylinders: -1,
-    totalHeads: -1,
-    totalSectors: -1,
-    totalTracks: -1,
-    tracksPerCylinder: -1,
-    sectorsPerTrack: -1,
+    bytesPerSector: null,
+    totalCylinders: null,
+    totalHeads: null,
+    totalSectors: null,
+    totalTracks: null,
+    tracksPerCylinder: null,
+    sectorsPerTrack: null,
     firmwareRevision: '',
     serialNum: '...serial....',
     interfaceType: 'PCIe',
@@ -537,9 +537,9 @@ setInterval(function() {
   rIO: 899825,
   wIO: 932331,
   tIO: 1832156,
-  rIO_sec: -1,
-  wIO_sec: -1,
-  tIO_sec: -1,
+  rIO_sec: null,
+  wIO_sec: null,
+  tIO_sec: null,
   ms: 0
 }
 {                           // second call
@@ -808,9 +808,9 @@ setInterval(function() {
   rx: 14015849472,
   wx: 15316003328,
   tx: 29331852800,
-  rx_sec: -1,
-  wx_sec: -1,
-  tx_sec: -1,
+  rx_sec: null,
+  wx_sec: null,
+  tx_sec: null,
   ms: 0
 }
 {                             // second call
@@ -890,4 +890,4 @@ setInterval(function() {
   </script>
 </body>
 
-</html>
+</html>

docs/graphics.html

@@ -489,8 +489,8 @@ si.graphics().then(data => console.log(data));</code></pre class="example">
       main: true,
       builtin: false,
       connection: 'Internal',
-      sizex: -1,
-      sizey: -1,
+      sizex: null,
+      sizey: null,
       pixeldepth: 24,
       resolutionx: 2560,
       resolutiony: 1600,
@@ -498,7 +498,7 @@ si.graphics().then(data => console.log(data));</code></pre class="example">
       currentResY: 1600,
       positionX: 0,
       positionY: 0,
-      currentRefreshRate: -1
+      currentRefreshRate: null
     }
   ]
 }</pre>
@@ -551,4 +551,4 @@ si.graphics().then(data => console.log(data));</code></pre class="example">
   </script>
 </body>
 
-</html>
+</html>

docs/network.html

@@ -287,7 +287,7 @@ si.networkInterfaces().then(data => console.log(data));</code></pre class="examp
     type: 'wired',
     duplex: 'full',
     mtu: 16384,
-    speed: -1,
+    speed: null,
     dhcp: false,
     dnsSuffix: '',
     ieee8021xAuth: '',
@@ -496,8 +496,8 @@ setInterval(function() {
     tx_bytes: 180934681,
     tx_dropped: 0,
     tx_errors: 0,
-    rx_sec: -1,
-    tx_sec: -1,
+    rx_sec: null,
+    tx_sec: null,
     ms: 0
   }
 ]
@@ -810,4 +810,4 @@ setInterval(function() {
   </script>
 </body>
 
-</html>
+</html>