Changed logic so dtcpip element is setup regardless if decrypting is needed.  dlnasrc will set dtcpip in "passthru-mode" for non-encrypted content.  This will facilitate changing URIs with no need to link or unlink dtcpip element.
Merge pull request #120 from cablelabs/dlnasrc-116-dtcpip-passthrough-support

Changed logic so dtcpip element is setup regardless if decrypting is nee...