network_diagnostics: Anonymize more FF parameters

A few more flimflam data fields now contain PII.  Make sure
network_diag doesn't expose them.

BUG=chromium-os:18517
TEST=Spot test mac_anonymize on (fake) user data.

Change-Id: Id1b0a9fb04f27e621dc59eceef19778b6a2bbb7f
Reviewed-on: http://gerrit.chromium.org/gerrit/5825
Reviewed-by: Ken Mixter <[email protected]>
Tested-by: Paul Stewart <[email protected]>
1 file changed