This uses the new on_action_enter & on_action_leave APIs to display
the full useragent string when hovering over one of the useragent
spoof menu options.
To implement the HttpOnly attribute, the CookieJar needs to know where a
request originated from. Namely, it needs to distinguish between HTTP /
non-HTTP (i.e. JavaScript) requests. When the HttpOnly attribute is set,
requests from JavaScript are to be blocked.
(...and ASSERT_NOT_REACHED => VERIFY_NOT_REACHED)
Since all of these checks are done in release builds as well,
let's rename them to VERIFY to prevent confusion, as everyone is
used to assertions being compiled out in release.
We can introduce a new ASSERT macro that is specifically for debug
checks, but I'm doing this wholesale conversion first since we've
accumulated thousands of these already, and it's not immediately
obvious which ones are suitable for ASSERT.
Frick it, let's just enable this by default and give ourselves a reason
to improve things! Some things are broken, and there's a bit of flicker
when resizing, but we can do this.
This drastically improves our web browsing security model by isolating
each tab into its own WebContent process that runs as an unprivileged
user with a tight pledge+unveil sandbox.
To get a single-process browser, you can start it with -s.
Now that WindowServer broadcasts the system theme using an anonymous
file, we need clients to pledge "recvfd" so they can receive it.
Some programs keep the "shared_buffer" pledge since it's still used for
a handful of things.
