On Linux, URLComponents does not have 100% the same behavior like on macOS. Vapor accounts for this unfixed bug by replacing percent-encoded semicolon %3B with ; in URIs.
This is however not fully correct, because if a URI contains a percent encoded semicolon, this might have a different meaning, than when it is not percent encoded, compare the following sentence from RFC 3986:
A percent-encoding mechanism is used to represent a data octet in a
component when that octet's corresponding character is outside the
allowed set or is being used as a delimiter of, or within, the component.
This PR aims to limit the impact of the required semicolon fix by ensuring that query and fragments are not unnecessarily and incorrectly modified.
Hopefully, in a future with the new swift-foundation this fix will not be needed anymore. But for now it would solve an issue on our side which is related to the concept of a signed request.