Updated Dutch translation 3.10
Bug #721581 - Unable to write to ldap addressbook
Bug #687640 - Crash in caldav's initialize_backend()

Two threads could call initialize_backend() simultaneously,
overwriting data one to the other, which caused the crash.
Bug #720676 - [IMAPX] Do more searching server-side

The SEARCH command doesn't support all the things evolution can
search for, but it can cover the most common cases, which speeds
searching significantly (especially when the folder content is not
required locally).