QUrl fails to parse correctly an afp network path

The way a raw url string is parsed into a QUrl instance can create an invalid url!

Example

QUrl("afp://Admin@Hetty-MacLeods-MacBook-Pro.local/admin/Pictures/Scan.jpeg");

will create an url of the form:

afp://Admin@hetty-macleods-macbook-pro.local/admin/Pictures/Scan.jpeg

Notice the change to lower case in the host!

Fortunately this is no longer a valid URL and for instance this call will fail to create a valid file:

g_file_new_for_uri(QUrl("afp://Admin@Hetty-MacLeods-MacBook-Pro.local/admin/Pictures/Scan.jpeg").toEncoded());

g_file_query_exists on the result will report false.
g_file_get_path will even return an empty string!

This issue obviously breaks Drag And Drop for network paths, at least for afp
(smb is fine, because it is lowercase already)

Debugging

The code which breaks the URL is:

File: qurlidna.cpp
Func: qt_ACE_do
Line: 2509

                if (uc >= 'A' && uc <= 'Z')
                    *out = QChar(uc | 0x20);

Note, the issue was present in 4.x as well!