All URLs can have a query component now
0 can be valid in IPv4. https://www.w3.org/Bugs/Public/show_bug.cgi?id=26363
Use the new [Exposed] syntax
Fix [Exposed] for URLSearchParams
Fix IPv6/IPv4 parsing bugs. Update HTML xref.

https://www.w3.org/Bugs/Public/show_bug.cgi?id=26360
https://www.w3.org/Bugs/Public/show_bug.cgi?id=26361
Stop using pop, fix bug in relative state https://www.w3.org/Bugs/Public/show_bug.cgi?id=26553
Merge remote-tracking branch 'upstream/master'