Detectiuon of wrong archive extension used

[davidsplash]

Detection of wrong extension used, and change them to the right one.

This feature is used in a program irfanview on images. So why nott have it in powerarchiver for archives. It would be great to have this feature as some archives around and some badly written programs have archives with the wrong extension and this can cause some program to fail to open them

[By-Tor]

I second this request.