[Exim] patch to passwd.c and route.c

I posted earlier on a patch to passwd.c, but that is not enough
without a corresponding patch to route.c, in the function
route_finduser:

   if (lastpw != NULL)
     {

>>> pwcopy.pw_passwd = lastpw->pw_passwd; <<<< insert this line

[or should it first go through string_format as the other members of
lastpw?
     pwcopy.pw_uid = lastpw->pw_uid;

Then, with the prev patch to passwd.c, you can then use passwd to
lookup passwords (...), for instance

For PLAIN: (tab = spaces)
server_condition = \
"${if     and\
    {\
        {!eq{$2}{}}\
        {!eq{$3}{}}\
        {crypteq\
                {$3}\
            {${extract{1}{:}\
                {${lookup passwd {$2}{$value}{*}}}\
            }}\
        }\
    }\
{1}{0}}"

Bugs? >@@:<

Giuliano