[macports/macports-ports] Update pure and pure-docs to 0.66 (#350)

[Ryan Schmidt]

> On Mar 7, 2017, at 06:25, Aljaž Srebrnič <g5pw at macports.org> wrote:
> 
>> On 07 mar 2017, at 13:00, Albert Graef <notifications at github.com> wrote:
>> 
>> There seems to be something going wrong with the buildbots. I'm getting a bunch of failures due to the build servers not being able to get the source tarballs from Bitbucket, even though they are all there and download all right for me. The errors look like this:
>> 
>> Error: Failed to fetch pure: Operation too slow. Less than 1024 bytes/sec transfered the last 60 seconds
>> 
>> @g5pw Do you have access to the build servers and see what's going on there?
>> 
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> Forwarding this to the -dev mailing list. It looks like the buildbots don’t have a reliable internet connection?

The buildbot's internet connection is reliable, but it is slow.

We don't mirror distfiles automatically right now. https://trac.macports.org/ticket/53347

This means each buildworker needs to download a copy of the source code from the original site, using up bandwidth. If the buildworkers are idle when a commit comes through, that means many buildworkers are trying to download the same file at the same time, which makes each download slower. In some cases, this could result in some of the downloads timing out. I have not seen this happen lately but I have seen it happen months ago when we first set the system up.

If you have a link to a buildbot log of this happening, I can take a look at it.

I can also mirror these distfiles manually.