Minor bug fix upgrades for third party dependencies

Addresses the issue that several third party libraries used by dCache
have bug fix releases newer than the version we use.

I would have liked to get these committed before 2.6.0 got released,
but didn't have the time to do it.

Target: master
Request: 2.6
Require-book: no
Require-notes: yes
Acked-by: Tigran Mkrtchyan <tigran.mkrtchyan@desy.de>
Patch: http://rb.dcache.org/r/5549/