Backported r3608 from trunk.
Merged r3529 from trunk.
Merged r3514 from trunk.
Merged r3558 from trunk.
Merged r3513 and r3531 from trunk.
Merged r3603 from trunk.
Merged r3539 from trunk.
Fixed: Update of Subversion changesets broken by r3466 under Solaris (#5255).
Check that admin LDAP user is untouched after authentication (#5263).
Fixes calculation of version estimated hours with subtasks (#5265).
