QUrl: Add an "appendingTo" parameter to QUrl::appendFragment

Will be needed in a future commit.

Change-Id: Ia5f384442d25d277e7582a20d1c37da4303c64c3
Reviewed-by: David Faure (KDE) <faure@kde.org>
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@digia.com>
Fix QUrl parsing of IPv6 hosts with encoded colons

Registered names and IP addresses can only contain unreserved
characters (letters, digits, dots, hyphens, underscores) and the
colon, which is a gen-delim. For registered names and IPv4 addresses,
we can simply use the default config -- if anything that remains
percent-encoded, it means it's not a valid hostname anyway.

For IPv6, we just need to decode the colon.

Change-Id: If8083d47f6e5375f760e7a6c59631c89e4da8378
Reviewed-by: David Faure (KDE) <faure@kde.org>
Fix IPvFuture use in QUrl

We have no idea what it might contain, but test it anyway to make sure
it works. Turns out there were a few bugs the unit tests have now
caught.

Change-Id: I0a6c868365feec31c2360b3c341c8ca6944f4352
Reviewed-by: David Faure (KDE) <faure@kde.org>
Make the URL Recode function to fix bad input in FullyDecoded mode too

So far, this function hasn't been used for input coming in from the
user, so it wasn't necessary. But we may want to do it, or we may
already be doing it accidentally somewhere that isn't triggering the
failed assertions during unit testing.

So let's be on the safe side and allow it. And test it too.

Change-Id: Ib63addd8da468ad6908278d07a4829f1bdc26a07
Reviewed-by: David Faure (KDE) <faure@kde.org>
QUrl: Uppercase the version number in IPvFuture

We don't know what it might be used for. The RFC for URI says it's an
HEXDIG, and since we uppercase all other HEXDIGs already (in
percent-encodings...).

Change-Id: I56d0a81315576dd98eaa2657c0307d79332543a5
Reviewed-by: David Faure (KDE) <faure@kde.org>
QUrl: Make sure we don't return a dangling pointer from parseIpFuture

Change-Id: I54bf8d0fe72b8db8d158899ee4525c8d067272b8
Reviewed-by: David Faure (KDE) <faure@kde.org>
Make QIPAddress::parseIp6 return the first bad character

In case of undetermined error, returns end.

Change-Id: Ic5d16bab5fc56ad24f19da25f73f9b844ce11d3f
Reviewed-by: David Faure (KDE) <faure@kde.org>
Make QUrl store the first bad IPv6 character in the error string

Change-Id: I9a0a521ff5c3188ba6f862e2b91369cb61787359
Reviewed-by: David Faure (KDE) <faure@kde.org>