Add option to allow insecure SSL certificate during 'update_vendors()'

[mpenning]

If you're behind a corporate proxy or other internet security device, downloading the latest client mac vendor DB may find unknown certificates in the lookup path...

from mac_vendor_lookup import MacLookup

obj = MacLookup()
obj.update_vendors()
oui_vendor = obj.lookup("aa:bb:cc:dd:ee:ff")

Running this yields...

ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:1007)

Please add an option to bypass ssl certificate checks during update_vendors()

[BUZZARDGTA]

UP @bauerj

[BUZZARDGTA]

Using the code example above, it works on my main PC but not on a fresh new Windows 10 VM.