[rel-2.5.0] move ns_server reference forward (MB-9926)

This includes the following commits into 2.5.0 builds:

commit 88679d76b222bfc3386aea2822e335dd3fcbd144
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:   Fri Jan 17 11:30:34 2014 -0800

    MB-9926: correctly propagate errors from find_missing_revs

    Previous code was incorrectly adding {error, idrev} pairs to list of
    missing revs causing ids that caused get-meta errors to be not
    included into list of actually replicated docs

    Change-Id: I0c10ab82460d201c95fa65a48479665a5b980af1
    Reviewed-on: http://review.couchbase.org/32603
    Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
    Reviewed-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>

commit 1b837394806354e1b0241284d2c1a65414ff9562
Author: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>
Date:   Thu Jan 16 13:29:11 2014 -0800

    Include "netstat -s" output into cbcollect_info.

    It's the same information that's provided in /proc/net/netstat but in
    a human-readable form.

    Change-Id: I08400afaa11e95b00fa42a6eee1fadef400f9f6e
    Reviewed-on: http://review.couchbase.org/32564
    Tested-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>
    Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>

While it can be said that nestat commit is not strictly necessary,
it's fully safe and is important improvement for cbcollectinfo.

Change-Id: I86f18c529ecfe9406c8b340bb9f6f871f6bbd44c
Reviewed-on: http://review.couchbase.org/32606
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>