Ignore offline sessions

Let mod_admin_extra and mod_configure ignore offline sessions when
querying the session table.

src/mod_admin_extra.erl

@@ -863,9 +863,10 @@ connected_users_vhost(Host) ->
 dirty_get_sessions_list2() ->
     mnesia:dirty_select(
       session,
-      [{#session{usr = '$1', sid = '$2', priority = '$3', info = '$4', _ = '_'},
-	[],
-	[['$1', '$2', '$3', '$4']]}]).
+      [{#session{usr = '$1', sid = {'$2', '$3'}, priority = '$4', info = '$5',
+		 _ = '_'},
+	[{is_pid, '$3'}],
+	[['$1', {{'$2', '$3'}}, '$4', '$5']]}]).
 
 %% Make string more print-friendly
 stringize(String) ->
@@ -900,7 +901,9 @@ user_sessions_info(User, Host) ->
 		   {'EXIT', _Reason} ->
 		       [];
 		   Ss ->
-		       Ss
+		       lists:filter(fun(#session{sid = {_, Pid}}) ->
+					    is_pid(Pid)
+				    end, Ss)
 	       end,
     lists:map(
       fun(Session) ->

src/mod_configure.erl

@@ -1917,17 +1917,19 @@ set_form(From, Host, ?NS_ADMINL(<<"end-user-session">>),
     case JID#jid.lresource of
       <<>> ->
 	  SIDs = mnesia:dirty_select(session,
-				     [{#session{sid = '$1',
+				     [{#session{sid = {'$1', '$2'},
 						usr = {LUser, LServer, '_'},
 						_ = '_'},
-				       [], ['$1']}]),
+				       [{is_pid, '$2'}],
+				       [{{'$1', '$2'}}]}]),
 	  [Pid ! {kick, kicked_by_admin, Xmlelement} || {_, Pid} <- SIDs];
       R ->
 	  [{_, Pid}] = mnesia:dirty_select(session,
-					   [{#session{sid = '$1',
+					   [{#session{sid = {'$1', '$2'},
 						      usr = {LUser, LServer, R},
 						      _ = '_'},
-					     [], ['$1']}]),
+					     [{is_pid, '$2'}],
+					     [{{'$1', '$2'}}]}]),
 	  Pid ! {kick, kicked_by_admin, Xmlelement}
     end,
     {result, []};