LU-10391 lnet: enhance connect/accept to support large addr

LU-10391 lnet: enhance connect/accept to support large addr

This patch introduces a version-2 of the acceptor protocol.  This
version uses a 'struct lnet_nid' rather than 'lnet_nid_t'

lnet_connect() now accepts a struct lnet_nid and uses version 2 if
necessary.  lnet_accept() accepts either v1 or v2.

Test-Parameters: trivial
Test-Parameters: serverversion=2.12 serverdistro=el7.9 testlist=runtests
Test-Parameters: clientversion=2.12 testlist=runtests
Signed-off-by: Mr NeilBrown <neilb@suse.de>
Change-Id: I523be0d217b6239c9791ff4fa536b9255c029ae7
Reviewed-on: https://review.whamcloud.com/42105
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Chris Horn <chris.horn@hpe.com>
Reviewed-by: Serguei Smirnov <ssmirnov@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>