MB-9876: sanitize config as part of dumping guts

And not by error-prone regexps

Change-Id: I692fa9b9e75f0d3cd392f100be792309c0860b12
Reviewed-on: http://review.couchbase.org/31798
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Reviewed-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>
allow _ for "certificate" parameter that doesn't need checking

I.e. so that things like testing latencies of proxied connections is
easier.

Change-Id: I81bb60458c7090cff9b3514d80a970c7a9021214
Reviewed-on: http://review.couchbase.org/31799
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Reviewed-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>
MB-9880: use tcp_nodelay on ssl proxy sockets

Because segmentation is already taken care of by our peers.

Change-Id: Ifc5bf9cd4d32b1c49b47bf7ca8aa487a24e9b1bf
Reviewed-on: http://review.couchbase.org/31800
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Reviewed-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>