Add shortcuts to some possibly useful functions.

src/account.lua

@@ -272,6 +272,8 @@ function Account.unsubscribe_mailbox(self, name)
     return r
 end
 
+Account.login = Account._login_user
+Account.logout = Account._logout_user
 
 Account._mt.__index = function () end
 Account._mt.__newindex = function () end

src/auxiliary.lua

@@ -63,3 +63,5 @@ function become_daemon(interval, commands, nochdir, noclose)
         commands()
     until ifsys.sleep(interval) ~= 0
 end
+
+sleep = ifsys.sleep

src/mailbox.lua

@@ -1151,6 +1151,8 @@ function Mailbox.enter_idle(self)
     return r
 end
 
+Mailbox.select = _cached_select
+Mailbox.close = _cached_close
 
 Mailbox._mt.__index = function () end
 Mailbox._mt.__newindex = function () end