binlog fixes

PIBinaryStream doc
remove makePIPair
rename bytesAvailable

libs/main/cloud/picloudserver.h

@@ -50,7 +50,7 @@ public:
 		int readDevice(void * read_to, int max_size) override;
 		int writeDevice(const void * data, int size) override;
 		DeviceInfoFlags deviceInfoFlags() const override {return PIIODevice::Reliable;}
-		ssize_t bytesAvailible() const override {return buff.size();}
+		ssize_t bytesAvailable() const override {return buff.size();}
 
 	private:
 		void pushBuffer(const PIByteArray & ba);