Thought about providing account identification when doing autoconfig request

[Cork]

Currently when kmail makes a provider autoconfig request[1] it doesn't provide the emailaddress query.

I wounder if it would be acceptable to provide it or possibly the emailmd5 evolution[2] is starting to use now.

[1] https://cgit.kde.org/kmail-account-wizard.git/tree/src/ispdb/ispdb.cpp#n82
[2] https://gitlab.gnome.org/GNOME/evolution/issues/306

// Cork