Make BadRequest and BadHeader both InvalidRequest.

lib/protocol/http1/error.rb

@@ -10,21 +10,19 @@ module HTTP1
 		class Error < HTTP::Error
 		end
 
+		# Indicates that the request is invalid for some reason, e.g. syntax error, invalid headers, etc.
 		class InvalidRequest < Error
 		end
 
-		# The specified content length and the given content's length do not match.
-		class ContentLengthError < Error
-		end
-
 		# The request was parsed correctly, but was invalid for some other reason.
-		class BadRequest < Error
+		class BadRequest < InvalidRequest
 		end
 
-		class BadHeader < Error
+		class BadHeader < InvalidRequest
 		end
 
-		class BadResponse < Error
+		# The specified content length and the given content's length do not match.
+		class ContentLengthError < Error
 		end
 	end
 end