LU-10391 lnet: change lnet_sock_connect to take sockaddr

LU-10391 lnet: change lnet_sock_connect to take sockaddr

Rather than passing a u32 IPv4 address plus port to
lnet_sock_connect() pass a 'struct sockaddr'.  This will allow IPv6
addresses to be requested.

Signed-off-by: Mr NeilBrown <neilb@suse.de>
Change-Id: I83ba37bcaade4a84cbce47d93f02043d038c5b29
Reviewed-on: https://review.whamcloud.com/37703
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Serguei Smirnov <ssmirnov@whamcloud.com>
Reviewed-by: Aurelien Degremont <degremoa@amazon.com>