MB-11281: Revert⁴ ".... pass swt low to child erlang"

This reverts commit 295673fbc2b8d399aa67ebad3b5e183534d31e0e.

It looks like swt low works and we're safe to enable it for 3.0 and
beyond.

Change-Id: Id26454e6feb2d80af13dc02b2e315eeaaaf17bb1
Reviewed-on: http://review.couchbase.org/37736
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Reviewed-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>
MB-11292: bump max allowed maxBucketCount to 8192

It's internal setting after all and self-foot-shooting is not
forbidden for this REST API endpoint.

Change-Id: I1664f265e289639c32ad2b724f470174d9659509
Reviewed-on: http://review.couchbase.org/37766
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Reviewed-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>
detach concurrency_throttle from xdc_replicator.hrl

Because there's nothing in this code that requires xdc_replicator.hrl

As part of this work I've moved concurrency_throttle_state record to
concurrency_throttle module because there's no need to define it in
include file.

Change-Id: I3c10fa2b1b837c872282c7910bcaade3fa555126
reindent concurrency_throttle

Change-Id: I35d4331186dbddd87fe340cfae7ddf9e0fbb2e90
use plain debug logger in concurrency_throttle

Change-Id: I207d5dccaea5a92e32aa44027f026686392c2cc8
allow parent-less concurrency_throttle

I.e. to be able to use it outside of xdcr.

Change-Id: Iba0b2fb2c731d9769273221bbf24a36b08c97d4b
pass nodefile arg and absolutize datapath for cluster_run

The former enables cbcollect_info on cluster_run clusters. And the
later is requested by couchbase-fork-of-memcached people.

Change-Id: I175e6efd8b85c7a563f1c529669b849cbf74c865
[cbcollect_info] added hidden --watch-stdin flag

So that we can spawn this thing from erlang and make it exit if erlang
asks it to

Change-Id: I5e7b31c4a988ec964eed4598dbf8ae458cb2dfb0
[cbcollectinfo] added flag to get per-process diag from one node

So that we can run cbcollectinfo on all nodes concurrently.

Change-Id: Icf9a3fa70fc86071bb1799e23ff8c7ddf9af3e35
[cbcollect_info] added "path to initargs" flag

So that we can do cbcollect_info for cluster_run nodes

Change-Id: I0705f8805f23352eb255474036f06d4cbcbe7b76
cbcollect_info: implemented --just-upload-into via curl

Change-Id: If8e1b1e282ee6b98723c132c8dcb09ad30326177
MB-10086 : auto collect info UI

Change-Id: Ie432570488184eefcfe8c6175c75e082d67cfee6
mark

Change-Id: I37262a199324b366f1025fbffcc6ba00d40949b9