public int getAppBuffSize() {
        return appBuffSize;
    }
Creates and initializes the SSLContext instance to use to encrypt the plain connection. This
class is also responsible for encoding and decoding the encrypted data and place it into
the corresponding the {@link ByteBuffer}.

@author Artur Hefczyc
@author Hao Chen
xmppserver/src/main/java/org/jivesoftware/openfire/net/TLSWrapper.java