fix typo in main() and add random ip generation

proxychain/requestmodifers/bot/bot_test.go

@@ -0,0 +1,28 @@
+package bot
+
+import (
+	"net"
+	"testing"
+)
+
+func TestRandomIPFromSubnet(t *testing.T) {
+	subnets := []string{"34.100.182.96/28", "207.46.13.0/24", "2001:4860:4801:10::/64", "2001:4860:4801:c::/64"}
+
+	for _, subnet := range subnets {
+		t.Run(subnet, func(t *testing.T) {
+			_, ipnet, err := net.ParseCIDR(subnet)
+			if err != nil {
+				t.Error(err)
+			}
+
+			ip, err := randomIPFromSubnet(subnet)
+			if err != nil {
+				t.Error(err)
+			}
+
+			if !ipnet.Contains(ip) {
+				t.Fail()
+			}
+		})
+	}
+}