[migration] mark all version prior 3.7 as non-migrable
API possible used by such old migration script are not supported in recent
Cubiweb.
Closes #2772958
import ConfigParser
try:
undo_actions = config.cfgfile_parser.get('MAIN', 'undo-support', False)
except ConfigParser.NoOptionError:
pass # this conf. file was probably already migrated
else:
config.global_set_option('undo-enabled', bool(undo_actions))