Updating www/p5-LWP-Authen-Negotiate from 0.06nb2 to 0.08

pkgsrc changes:
  - Adding license definition
  - MIME::Base is included in perl core in high enough version

Upstream changes:
0.08    Do 29. Okt 22:09:12 CET 2009
        - added LWP::Debug to dependencies...
0.07    Di 27. Okt 20:51:50 CET 2009
        - fixed <https://rt.cpan.org/Public/Bug/Display.html?id=50881>
          Thanks to Adam Sjogren.

(sno)