What does "use the fingerprint to validate the certificate manually" mean?
If you get a message such as the following:
Error validating server certificate for 'https://projectname.googlecode.com:443': - The certificate is not issued by a trusted authority. Use the fingerprint to validate the certificate manually!...you should check that the "fingerprint" or "SHA1 fingerprint" given for the certificate is:
B1:3A:D5:38:56:27:52:9F:BA:6C:70:1E:A9:AB:4A:1A:8B:DA:FF:EC. If it is not, please email us at firstname.lastname@example.org.