New and improved LDAP module, now with active directory support. People using LDAP authentication may want to check if their configuration is still working, as far as I know nothing changes if you keep the new settings at their defaults.

git-svn-id: http://observium.org/svn/observer/trunk@4114 61d68cd4-352d-0410-923a-c4978735b2b8
try user/password DN bind if binddn is empty

git-svn-id: http://observium.org/svn/observer/trunk@4115 61d68cd4-352d-0410-923a-c4978735b2b8