plugin manhole: added d to namespace as shortcut for defer.ensureDeferred

sat/plugins/plugin_dbg_manhole.py

@@ -22,7 +22,7 @@ from sat.core.constants import Const as C
 from sat.core.log import getLogger
 from twisted.conch.insults import insults
 from twisted.conch.telnet import TelnetTransport, TelnetBootstrapProtocol
-from twisted.internet import reactor, protocol
+from twisted.internet import reactor, protocol, defer
 from twisted.words.protocols.jabber import jid
 from twisted.conch.manhole import ColoredManhole
 
@@ -59,6 +59,7 @@ class Manhole(object):
             "host": self.host,
             "C": C,
             "jid": jid,
+            "d": defer.ensureDeferred,
         }
         f.protocol = lambda: TelnetTransport(TelnetBootstrapProtocol,
                                              insults.ServerProtocol,