CA-37279: Stunnel error from WLB connect "No route to host"
CA-37279: Stunnel error from WLB connect "No route to host"

Understand "No route to host" as an expected error message from stunnel, and turn that into API error WLB_UNKNOWN_HOST if we see it when contacting WLB.

This is two patches, one for xen-api-libs.hg, and one for xen-api.hg.

Signed-off-by: Ewan Mellor <37d327f49c878137250e0b5d97408bd8b93d87e0@eu.citrix.com>

xapi-project/message-switch,djs55/forkexecd,xapi-project/message-switch,johnelse/forkexecd,xapi-project/message-switch