verify lack of windows support

[skibz]

No description provided.

[abijahm]

what is needed to add windows support?

[skibz]

in theory tephra may already support windows, i've just not been able to write a CI build for windows on appveyor that gets far enough for me to be certain. (i last attempted this close to a year ago)

to run the tephra test suite, we need to be able to exec a binary provided by freeradius that sends radius packets to our test cases. at the moment, the binary is added to the repo in the travis CI build. maybe if freeradius can compile for windows, or if we can find a prebuilt radclient binary for windows we'll be able to get this going.

another option is to replace the freeradius binary for non-unix platforms and to use node's dgram module and node-radius directly.