If a jailbreak app contains the relevant Fugu14 entries in its Info.plist, AltStore will automatically guide the user through the Fugu14 untether process before installing the jailbreak.
Assuming the certificate used to originally sign an app is still valid, we can refresh an app simply by installing new provisioning profiles. However, if the signing certificate is no longer valid, we fall back to the old method of resigning + reinstalling.
Uses embedded certificate from AltServer if possible, but then falls back to asking user to refresh AltStore manually if the certificate used to install AltStore is revoked.
