NIST-SIP v1.1 instant messaging (IM) tool========================================This is an example of how to use the JAIN-SIP 1.1 API to build  a client software.IMPORTANT:    - UDP and TCP support.    - The IM user agent processes MESSAGE, INFO, OK, BYE, SUBSCRIBE, NOTIFY and REGISTER      sip messages. There is support for ACK  but not yet implemented!            - Client Authentication support (DIGEST).      - Buddies uploading, you can define your buddies in an XML file, they will be uploaded      by the application, take a look at "buddies.xml" for more details!     - This application was successfully tested with Microsoft Messenger, Siemens user agent,      Cisqo User Agent and our SIP proxy, registrar, presence server!    - The XML supported formats for NOTIFY's body are "xpidf+xml"      and "cpim-pidf+xml"!    Refer to docs/gov/nist/sip/instantmessaging/README.html for more informations onhow to use the client.------------------------------------------------------------------------------Author mailto:"Olivier Deruelle" <deruelle@antd.nist.gov>------------------------------------------------------------------------------If you experience any problems please contact:mailto:nist-sip-dev@antd.nist.gov