MLab-NS makes tiny distinctions matter too much

[pboothe]

MLab-NS always chooses the geographically closest site or sites. This means that in choosing between two close sites, one of which is 1000 miles away and the other is 1001, MLab-NS will never return a site from the second group. This means that people entering site locations need to make sure that the floating point numbers they put in for lat/lon are always equal with one another. Requiring floating point equality in order for the system to maintain a sensible behavior is dumb and wrong.

MLab-NS should stop making distinctions without a difference. If the distance to the closest sites is within, say, 50 miles and/or 5% of one another, then all sites meeting that criteria should be included in the choice of site.