run.dlang.io "all versions" has become useless

[Steven Schveighoffer]

Write a pretty trivial program to test if maybe a regression happened on 
run.dlang.io, and it now always has a server error.

I believe the error is from a timeout because we have so many versions 
of the compiler in the list.

A couple ways to fix this:

1. Start incrementing the oldest version. Not ideal, but at least better 
than not working. Probably the easiest fix.
2. Most likely it got through most of the versions. So you can cache the 
partial result, and continue it on a subsequent run (it already caches 
completed results).
3. Change the dropdown to range the "previous versions" when they start 
timing out, i.e. instead of 2.060 - latest, you have 2.060 - 2.065, and 
2.066 - latest as a separate option.

I use this facility all the time to see if something is a regression or 
not, and it's no longer working. This is a wonderful mechanism that I 
definitely miss.

-Steve