Report actual versionString in FSEQ ping

Use the runtime versionString for sys["version"] instead of the hardcoded "4.0" and parse versionString to derive the ping packet's major/minor version fields. The code strips any suffix after a '-' and extracts major/minor from the X.Y form, falling back to 0 if not present, so discovery packets and system info reflect the actual firmware version.

Author: Danit2

usermods/FSEQ/usermod_fpp.h

@@ -232,7 +232,7 @@ class UsermodFPP : public Usermod {
 	  sys["hostname"] = devName;
 	  sys["id"] = WiFi.macAddress();
 	  sys["ip"] = WiFi.localIP().toString();
-	  sys["version"] = "4.0";
+	  sys["version"] = versionString;
 	  sys["hardwareType"] = "ESPixelStick";
 	  sys["type"] = 195;
 	  sys["num_chan"] = strip.getLength() * 3;
@@ -273,10 +273,23 @@ void sendPingPacket(IPAddress destination = IPAddress(255, 255, 255, 255)) {
   // --------------------------------------------------
   // Version (MSB first!)
   // --------------------------------------------------
-  uint16_t versionMajor = 16;
+  uint16_t versionMajor = 0;
   uint16_t versionMinor = 0;
 
-  buf[10] = (versionMajor >> 8) & 0xFF;  // MSB first!
+  String ver = versionString;
+
+  int dashPos = ver.indexOf('-');
+  if (dashPos > 0) {
+    ver = ver.substring(0, dashPos);
+  }
+
+  int dotPos = ver.indexOf('.');
+  if (dotPos > 0) {
+	versionMajor = ver.substring(0, dotPos).toInt();
+	versionMinor = ver.substring(dotPos + 1).toInt();
+  }
+
+  buf[10] = (versionMajor >> 8) & 0xFF;
   buf[11] = versionMajor & 0xFF;
   buf[12] = (versionMinor >> 8) & 0xFF;
   buf[13] = versionMinor & 0xFF;