Comment 5 for bug 1604010

I was building upstream ntp as-is having --with-sntp=no as debian/rules does.
And just as I assumed, the old 4.2.6 build "ignored" the "--with-sntp=no" and built it anyway.
While the new one follows the order.

This was changed way back in:
commit dd3be096e78eb8d13da36caad215c9f5c009b11a
Author: <email address hidden>
Date: Sun Feb 20 20:23:00 2011 +0000

    Attempt typical subpackage approach for libevent
    sntp test cleanup

But this is just where 4.2.7/4.2.8 development started which is why it is different in 4.2.6 as in Trusty/Jessie.