add other webshell collect repository

url : [https://github.com/tdifg/WebShell](https://github.com/tdifg/WebShell)

add public-shell repository

url : [https://github.com/BDLeet/public-shell](https://github.com/BDLeet/public-shell)

add web-backdoors

url : [https://github.com/all3g/fuzzdb/tree/master/web-backdoors](https://github.com/all3g/fuzzdb/tree/master/web-backdoors)

add web-shell

url : [https://github.com/BlackArch/webshells](https://github.com/BlackArch/webshells

add webshellSample

url : [https://github.com/tanjiti/webshellSample](https://github.com/tanjiti/webshellSample)

add Ridter'Pentest backdoor tools

url : [https://github.com/Ridter/Pentest/tree/master/backdoor](https://github.com/Ridter/Pentest/tree/master/backdoor)

add xl7dev'WebShell

url : [https://github.com/xl7dev/WebShell](https://github.com/xl7dev/WebShell)  小乐天 From: Knownsec