Save new password even if it has not changed

I have recently changed the password scheme of my Dovecot/Postfix/Roundcube installation. New passwords are encrypted stronger than before. It is not possible to automatically update existing passwords (because the old encryption is not so bad that I can easily crack it). But I'd like to tell my users that they can upgrade to the new password scheme by simply submitting the "change password" form with their old password in all three input fields. Currently a minor optimization prevents this. I think this minor optimization should be removed.
Added config option "password_force_save"
Use new config option "password_force_save"
Fixed wrong copy-paste
Replaced nasty eval() expressions.
Merge branch 'master' of https://github.com/roundcube/roundcubemail
Replaced stupid fix by create_function() based approach.
Replaced last eval(). Allowing function calls in expressions.
Removed parse_expression() & added error logging to eval_expression().
Merge branch 'master' of https://github.com/roundcube/roundcubemail
Merge branch 'master' of git.next-step-software.com:/git-pub/roundcubemail
Fix incorrect handling of some specific links (#1489060)
Add note about required MSSQL database language settings
Fix error when using check_referer=true
Extend fetched header block to 32K, require one of subjct, from or to headers
Fix error handling in CLI mode, use STDERR and non-empty exit code (#1489043)
Fix exit code on bootsrap errors in CLI mode (#1489044)
Fix possible collision in generated thumbnail cache key (#1489069)
Add db_prefix configuration option in place of db_table_*/db_sequence_* options
Make possible to use db_prefix for schema initialization in Installer (#1489067)
Fix updatedb.sh script so it recognizes also table prefix for external DDL files
Fix messages list focus issue in Internet Explorer (#1489058)