Update netgear_r7000_cgibin_exec docs

- Add 'Introduction' header
- Make module name in intro into code (easier to read)

Author: cbrnrd

documentation/modules/exploit/linux/http/netgear_r7000_cgibin_exec.md

@@ -1,4 +1,5 @@
-The netgear_r7000_cgibin_exec module exploits a command injection vulnerability in Netgear R7000 and R6400 router firmware version `1.0.7.2_1.1.93` and possibly earlier. The vulnerability is found in the `/cgi-bin/` folder of the router. A manual injection would look like so: `http://<RouterIP>/cgi-bin/;echo$IFS"cowsay"`. This will echo 'cowsay' on the router. A fairly useful manual command injection is like so: `http://<RouterIP>/cgi-bin/;telnetd$IFS-p$IFS'45'` will open telnet on port 45.
+## Introduction
+The `netgear_r7000_cgibin_exec` module exploits a command injection vulnerability in Netgear R7000 and R6400 router firmware version `1.0.7.2_1.1.93` and possibly earlier. The vulnerability is found in the `/cgi-bin/` folder of the router. A manual injection would look like so: `http://<RouterIP>/cgi-bin/;echo$IFS"cowsay"`. This will echo 'cowsay' on the router. A fairly useful manual command injection is like so: `http://<RouterIP>/cgi-bin/;telnetd$IFS-p$IFS'45'` will open telnet on port 45.
 
 
 ## Vulnerable Application