mail_get_stream(): If we have virtual size cached, we don't have to read the entire body to get its size. Instead use cached virtual size - hdr size.
mail_get_stream(): If we have virtual size cached, we don't have to read the
entire body to get its size. Instead use cached virtual size - hdr size.

--HG--
branch : HEAD

jwm/dovecot-notmuch,jkerihuel/dovecot,jwm/dovecot-notmuch,jwm/dovecot-notmuch,jwm/dovecot-notmuch,jkerihuel/dovecot,jkerihuel/dovecot,jwm/dovecot-notmuch,jkerihuel/dovecot,jkerihuel/dovecot