Renegotiate if the remote end got disconnected and now got back online.

src/chat_control.py

@@ -2262,12 +2262,11 @@ class ChatControl(ChatControlBase):
 			#      notexistant check
 			if not e2e_is_active and e2e_pref and \
 			not self.no_autonegotiation and gajim.HAVE_PYCRYPTO \
-			and e2e_pref and gajim.capscache.is_supported(
-			self.contact, NS_ESESSION) and not \
-			gajim.capscache.is_supported(self.contact,
-			'notexistant'):
-				self.no_autonegotiation = True
+			and gajim.capscache.is_supported(self.contact,
+			NS_ESESSION) and not gajim.capscache.is_supported(
+			self.contact, 'notexistant'):
 				self.begin_e2e_negotiation()
+				self.no_autonegotiation = True
 		else:
 			self.send_chatstate('active', self.contact)
 

src/gajim.py

@@ -776,12 +776,20 @@ class Interface:
 
 				# disable encryption, since if any messages are
 				# lost they'll be not decryptable (note that
-				# this contradicts XEP-0201 - trying to get the
+				# this contradicts XEP-0201 - trying to get that
 				# in the XEP, though)
+				#
+				# FIXME: This *REALLY* are TOO many leves of
+				#	 indentation! We even need to introduce
+				#	 a temp var here to make it somehow fit!
 				if gajim.connections[account].sessions. \
 				has_key(ji):
 					for sess in gajim.connections \
 					[account]. sessions[ji].values():
+						ctrl = sess.control
+						if ctrl:
+							ctrl.no_autonegotiation\
+								= False
 						if sess.enable_encryption:
 							sess.terminate_e2e()
 							gajim.connections \