configure.in -- db checking

[Clint Adams]

> Isn't there more to it than that? Your patch seems to look for
> db_create_4000, which would require corresponding precompiled code so that
> this function is used when version 4 of the BerkeleyDB library is in use. Am
> I missing something?

db.h #defines db_create to db_create_4000 .
I think they've gone back to exporting an actual 'db_create' symbol in
db 4.1.