cdriver: strerror message on UNIX domain socket connection failure
cdriver: strerror message on UNIX domain socket connection failure

Maybe it would be worth it to create a macro for it
and use it at other places too.

Signed-off-by: u2yg <07c9524a2b634a164845665f2517c0734013e986@users.noreply.github.com>

u2yg/mongo-c-driver,u2yg/mongo-c-driver,u2yg/mongo-c-driver,u2yg/mongo-c-driver