bug#4231: 23.1; `C-x r l' - should not ask for password until you try to jump to bookmark

[Drew Adams]

If you use `C-x r l' and one of your bookmarks is to a remote file or
directory, you are prompted for the password while
`bookmark-bmenu-list' is trying to list the bookmarks. It stops at
that bookmark before listing any others, and asks for the password. It
does this for each remote bookmark where a password is required.
 
This is very wrong.
 
Worse: If you give the wrong password, it simply stops working -
finished. You will never see the other bookmarks that follow that one.
 
All such bookmarks should simply be listed - presume that the password
will be given when needed. When you ask to jump to the bookmark,
that's the time to ask for the password (the first time only,
obviously).
 

In GNU Emacs 23.1.1 (i386-mingw-nt5.1.2600)
 of 2009-07-29 on SOFT-MJASON
Windowing system distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (4.4)'