Server Variables REQUEST_URI documentation incorrect

[PaddoSwam]

It seems that the documentation regarding IIS Server Variables is relatively old and contains at least one issue:

REQUEST_URI	The path-absolute part of the URI.For example https://contoso.com:8042/over/there?name=ferret would return /over/there

Encountering an issue and seeing a similar one: https://stackoverflow.com/questions/48457010/iis-url-rewrite-module-repeats-query-string

[PaddoSwam]

I've corrected the documentation in #406