qemu-nbd: Replace BSDism <err.h> by error_report()

qemu-nbd: Replace BSDism <err.h> by error_report()

Coccinelle semantic patch

    @@
    expression E;
    expression list ARGS;
    @@
    -       errx(E, ARGS);
    +       error_report(ARGS);
    +       exit(E);
    @@
    expression E, FMT;
    expression list ARGS;
    @@
    -       err(E, FMT, ARGS);
    +       error_report(FMT /*": %s"*/, ARGS, strerror(errno));
    +       exit(E);

followed by a replace of '"/*": %s"*/' by ' : %s"', because I can't
figure out how to make Coccinelle transform strings.

A few of the error messages touched have trailing newlines.  They'll
be stripped later in this series.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <1450452927-8346-2-git-send-email-armbru@redhat.com>