[connection] move hook control logic on Connection The _hook_control context manager now operate on connection. We have to keep a specific entry point in Session to ensure Connection object are properly cleaned up when using session to "manage" Connection live cycle. Related to #2503918

     1

import ConfigParser

     2

try:

     3

    undo_actions = config.cfgfile_parser.get('MAIN', 'undo-support', False)

     4

except ConfigParser.NoOptionError:

     5

    pass # this conf. file was probably already migrated

     6

else:

     7

    config.global_set_option('undo-enabled', bool(undo_actions))