* protocol changes
* server changes
* client changes for password reset and registration
* add hashed password to change password in client
* always use hashed password to log in
* add warning to client when using plain text password
* require real password for changing email on server
this is backwards compatible as users logged in with a real password on
older clients will not need this, only users logged in with a hashed
password
* implement password dialog when changing email
* require min password length
* use qstringlist to build query instead
* use clear instead of = ""
* add max to password dialog
* use proper const ness in abstractclient
* reject too long passwords instead of trimming
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