[Status] Add support for permalinks to searches and filters.
[Status] Add support for permalinks to searches and filters.

For example, a filter for all proposals implement in Swift 4:
/#version:4

Or other interesting combinations of parameters:
/#filter:.implemented::search:rename
/#proposal:SE-0001,SE-0010,SE-0100

airspeedswift/swift-evolution,Nirma/swift-evolution,natecook1000/swift-evolution,anandabits/swift-evolution,allevato/swift-evolution,rballard/swift-evolution,ddunbar/swift-evolution,rballard/swift-evolution,DevAndArtist/swift-evolution,apple/swift-evolution,ddunbar/swift-evolution,apple/swift-evolution,jckarter/swift-evolution,aciidb0mb3r/swift-evolution,bolshedvorsky/swift-evolution,DevAndArtist/swift-evolution,natecook1000/swift-evolution,Nirma/swift-evolution,bolshedvorsky/swift-evolution,jtbandes/swift-evolution,abertelrud/swift-evolution,abertelrud/swift-evolution,jtbandes/swift-evolution,hartbit/swift-evolution,aciidb0mb3r/swift-evolution,jckarter/swift-evolution,allevato/swift-evolution,anandabits/swift-evolution,airspeedswift/swift-evolution,hartbit/swift-evolution