Add packet option help for udp

Author: Bastih18

README.md

@@ -45,6 +45,7 @@ noping <ip> [OPTIONS]
 | `-m, --minimal` | Minimal output mode. |
 | `-v, --version` | Print detailed version information.
 | `--proto <tcp/udp>` | Protocol to use when a port is specified (default: TCP) |
+| `-pa, --packet <packet>` | Packet to send to UDP target (default: tries to find a valid packet based on port) |
 | `--update [version]` | Update noping to the specified version (when empty, it updates to the latest version).
 
 ## Examples

helpMenu.go

@@ -17,6 +17,7 @@ func printHelpMenu() {
 	fmt.Println("    -t, --timeout <timeout>        timeout in milliseconds (default: 1000) [OPTIONAL]")
 	fmt.Println("    -m, --minimal                  print only the minimum information (default: false) [OPTIONAL]")
 	fmt.Println("    -v, --version                  print detailed version information")
+	fmt.Println("    -pa, --packet <packet>         packet to send to UDP target (default: tries to find a valid packet based on port)")
 	fmt.Println("    --proto <protocol (tcp/udp)>   protocol to use (default: tcp) [OPTIONAL]")
 	fmt.Println("    --update [version]             update noping to the specified version (when empty, it updates to the latest version)")
 	fmt.Println("")