Minor license change

[troglobit]

Hi,

I noticed that lldpd seems to have a slightly older version of the ISC License. To avoid ambiguity they "recently" changed an "and" to an "and/or" in the first sentence. See http://en.wikipedia.org/wiki/ISC_license for details.

Thank you for a great piece of software!

[vincentbernat]

Thanks for the notice. I have updated the license.