key-init makes sure trustdb is updated at run time and user and distro keys are ultimately trusted. Each time a file is signed, the related public key is showed without error on it's trustability.
flash-gui deals with gpg1 to gpg2 migration. If pubring.kbx is found, pubring.gpg is deleted from running rom dump.
.ash_history: add examples to generate keys and otrust in rom
flash-gui: export otrust and import it in rom
key-init: import otrust.txt if present to supress warning about user public key being untrusted
