Checks if the specified keyid should automatically be signed.

def check_autosign(self, keyid, autosign_grains=None):
        '''
        Checks if the specified keyid should automatically be signed.
        '''
        if self.opts['auto_accept']:
            return True
        if self.check_signing_file(keyid, self.opts.get('autosign_file', None)):
            return True
        if self.check_autosign_dir(keyid):
            return True
        if self.check_autosign_grains(autosign_grains):
            return True
        return False