[IPP] Updated draft of IPP Authentication Methods posted

[Kennedy, Smith (Wireless & Standards Architect)]

Greetings,

I posted an updated draft of IPP Authentication Methods on Dec. 22:

   https://ftp.pwg.org/pub/pwg/ipp/wd/wd-ippauth-20181222-rev.pdf
   https://ftp.pwg.org/pub/pwg/ipp/wd/wd-ippauth-20181222.pdf
   https://ftp.pwg.org/pub/pwg/ipp/wd/wd-ippauth-20181222.odt
   https://ftp.pwg.org/pub/pwg/ipp/wd/wd-ippauth-20181222-rev.odt

Updated with changes and feedback from review in November 2018 PWG F2F:
* Updated exception cases in section 3.3 to delineate authorization and authentication failure exception cases
* Restored all UML diagrams to their previous state, removing the authentication and authorization failure cases
* Rewrote recommendations in section 5.

Happy new year!

Smith

/**
    Smith Kennedy
    HP Inc.
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