Not clearing OS certificate cache

[pmeenan]

Right now it is hard-coded and not available to be bypassed. The repeat view runs should not have the certificate cache cleared, just the first view runs (which should be the same for a real first view where the user has never seen your certs before). Shared certs like Google and Facebook are a little fuzzier.

I could potentially add a setting that let you keep the cert cache between runs but there would still be a hit on the first run and Chrome and Firefox would still have theirs cleared out between runs.