Check if rules already exist in IIS (Windows) web.config file

[markonikolic985]

When we add rules to IIS config file, we don't check if rules already exist. If it does, it breaks things and users get 500 error.

Example ticket can be found here. Once they removed rules manually, it started working.

I haven't seen the full code of their web.config file so maybe we should test it on our end to confirm it will break things by default.

[markonikolic985]

There is another case. This user shared the code so it might be useful for checking.

[saranshj4]

https://secure.helpscout.net/conversation/2641363511/500464/ https://secure.helpscout.net/conversation/2578909533/488158/ https://secure.helpscout.net/conversation/2499684228/472913/ https://secure.helpscout.net/conversation/2546667216/482302/ https://secure.helpscout.net/conversation/2443172507/461813/ https://secure.helpscout.net/conversation/2385590103/447528/ https://secure.helpscout.net/conversation/2156677490/401311/

and few more with tag - img_iis

[tripflex]

You are double loading staticContent should only one ever exist

[tripflex]

How has this still not been resolved? This completely takes a site down whenever you activate this

[tripflex]

@wordpressfan @MathieuLamiot @Khadreal @jeawhanlee @remyperona