LDAP users should not have change password option

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Log in to an LDAP user account.
2. Click on Configuration.

What is the expected output? What do you see instead?
The Password Change button is displayed.  LDAP passwords cannot be changed from 
here.  Perhaps the a message like this would be better:
"Your account password is managed on an external server. To change your 
password, please see your system administrator."

What version of the product are you using? On what operating system?
Mollify 2.5.10, Ubuntu 12.04

Please provide any additional information below.
Samuli, great work on this product! This is much improved over version 1.8.  
Modest donation coming your way.

Original issue reported on code.google.com by l...@d5.ca on 6 May 2014 at 4:34

[GoogleCodeExporter]

I'll remove it entirely in this case, thanks for the report

Original comment by samuli.j...@gmail.com on 10 May 2014 at 3:04

• Changed state: Accepted

[GoogleCodeExporter]

Fixed in 2.5.11

Original comment by samuli.j...@gmail.com on 11 May 2014 at 10:48

• Changed state: Fixed