Distinguish between offline and unknown hosts

Limelight/Database/TemporaryHost.h

@@ -11,7 +11,7 @@
 
 @interface TemporaryHost : NSObject
 
-@property (nonatomic) BOOL online;
+@property (nonatomic) State state;
 @property (nonatomic) PairState pairState;
 @property (nonatomic, nullable) NSString * activeAddress;
 @property (nonatomic, nullable) NSString * currentGame;

Limelight/Database/TemporaryHost.m

@@ -16,6 +16,7 @@
     self = [super init];
     self.appList = [[NSMutableSet alloc] init];
     self.currentGame = @"0";
+    self.state = StateUnknown;
     
     return self;
 }