md5_final() didn't properly clear the whole MD5 context. Also changed to use safe_memset(). Patch by Andrey Panin
md5_final() didn't properly clear the whole MD5 context. Also changed to use
safe_memset(). Patch by Andrey Panin

--HG--
branch : HEAD

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