adding letmeout script

I created a quick bash script to test open ports that are available for exfil using mubix's site.

useful_commands_and_scripts/letmeout.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+# quick script to test exfil ports
+# using mubix letmeoutofyour.net website
+# omar santos @santosomar
+
+
+for i in $(eval echo {$1..$2})
+do
+    echo "Is port $i open for potential exfil?"
+    curl http://letmeoutofyour.net:$i
+
+done