This rewrites the websocket channel network change detection function to not
skip part of its logic in a situation that has already been checked, preventing
a thread race. See analysis of the problem in the issue.
Casting it to an int16_t was wrong and would preclude the check for high port
numbers (due to overflow).
This makes the type matching, but adds an explicit check to ensure the port
number passed in is within a valid range.
Apparently Mozilla completely spaced out on this when adding the CSP nonce
mechanism, potentially causing web compat issues if scripting relies on
being able to get/set nonces through DOM and/or causing CSP policy check
issues if websites try to "hide" nonces.
Make essential Tauthon's builtins and modules available in sandboxes, without
disrupting building with Python 2.7.
1. Allow new builtins and modules. "__build_class__" is for
building... new-style classes (to handle the new metaclass syntax imported from
3.x). "_oserror" is necessary because of internal changes to raise errors
deriving from OSError (which are reported as IOError if not caught).
2. Look for modules and packages in the right places.
This was tested on FreeBSD, and should work out of the box on Linux.
The removal of this preference was botched, all other surrounding plumbing changes appear to be working okay. The ability to use prefs to control this stylesheet might be useful in the future, so perhaps this is one of those "if it ain't broke, don't fix it" bugs where leaving well enough alone in the first place would have been the best choice.
This PR passes all current tests for this feature, and implements the "prefers-color-scheme" media query as an enumerated keyword that is controlled by an integer preference.
Currently, the possible options are 0 to see a website's fallback code and essentially behave like this isn't implemented (our current behavior), 1 to express a preference for a light theme (the default for spec reasons), and 2 to express a preference for a dark theme. Over time, this list may expand to include other preferences like a preference for a sepia theme or something, and this leaves us prepared for that future.
