(#5102) - specify md5 data encoding

[omsmith]

The default encoding was switched to utf8 in nodejs/node#5522

[omsmith]

Fixes #5102

[daleharvey]

To be honest I dont 100% understand this issue, however its certainly related #2580, would be good to have this settled, is binary deprecated / should we switch to utf8, or is being explicit about the type we want all thats needed and this PR resolves everything?

[daleharvey]

@omsmith So I screwed up and forgot to actually add the travis stable run to verify that this fixes the tests, any chance you could rebase this on master to verify the fix works in node 6? (added 9ec5cea)

[daleharvey]

Awesome thanks

[nolanlawson]

@daleharvey The difference is that 'binary' is no longer implicit in Node 6. I actually recall seeing in the documentation some time ago that that API was subject to change, so I probably should have added 'binary' earlier.

I'm +1 on this change because it matches the Node <6 behavior, as well as the behavior in the browser and in CouchDB (except for strings, where CouchDB gets weird because Erlang).

[daleharvey]

Awesome, so this will also close out #2580 right? also 👍 when green

[omsmith]

@daleharvey #2580 is closed out by nodejs/node#3441

[daleharvey]

Awesome thanks

[daleharvey]

Great all passing :)