Fix better detection of vulnerable router for linksys/eseries_themoon_rce exploit

[bobby753]

Status

**READY

Description

Better detection of vulnerable router in the exploit routers/linksys/eseries_themoon_rce
The exploit checks whether the returned response code is 200,301 or 302 but some webpages uses custom 404 which makes them look as 200 OK so the exploit assumes the machine is vulnerable but it is not.

Verification

1. Start ./rsf.py
2. use exploits/routers/linksys/eseries_themoon_rce
3. set target 192.168.1.1
4. check

##Note
My router wasn't vulnerable to it but it returned as vulnnerable even autopwn also returned vulnerable