[server] fix unittest_security for py3k
- use source.binary_to_str instead of str(), helps when the backend
returns memoryviews
- fixup str vs bytes
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))