This is defined when building on GNU/Hurd, the GNU operating system with
the Hurd as its kernel (as it was designed originally, before Linux and
GNU/Linux came to be).
Also, define the corresponding part of User-Agent.
Absolute paths in man page links such as
```
[some link](/foo/bar)
```
Were being interpreted as relative paths when rendered in HTML. This
issue was observed in #20889 and #20041.
The fix is to make sure we don't leave any absolute paths when parsing
links. Instead we check if a directory is absolute (by checking for `/`)
and add `file://` accordingly. This turns the above link into:
```
[some link](file:///foo/bar)
```
Which does get interpreted correctly when rendered as HTML.
- fixes#20889
- fixes#20041
Before this patch, opening the Help application would raise an error.
Now all the pictures in the man pages render correctly.
This should allow us to add a Element::attribute which returns an
Optional<String>. Eventually all callers should be ported to switch from
the DeprecatedString version, but in the meantime, this should allow us
to port some more IDL interfaces away from DeprecatedString.
Previously, the code assumed that in dividing up the space in the
affected tracks there would never be an overshoot. Instead, we can
check for each track how much extra space is left and never consume any
extra.
In the same way, we can ensure that all extra space is consumed by
distributing all remaining extra space starting from the first track.
Thus, if there is no growth limit, the space distribution should always
consume all the extra space.
The spec says that the sum of affected size + item-incurred increase
should reach the limit, rather than just the item-incurred increase.
This seems to improve layout on the testcase `row-span-2-with-gaps`.
The extra line of space at the bottom of the left div
(`div.grid-item.item-span-two`) is not present anymore, matching other
browsers' layout much more closely.
Support the optional `<attr-type>` parameter to the `attr()` function,
which allows parsing the attribute's value as a variety of types,
instead of always as a string.
Resolving typed `attr()` functions is going to involve using more
internal Parser methods, so this is the simplest solution for that.
Also... resolving these is basically parsing them, so it makes more
sense for that process to live here.
This is just moving code, with minimal changes so it still works.
