Fix #166 Messages not sorted by date

[LC43]

This will fix #166

Tested the commits from @linsomniac, and it works.

[lombad]

If this fix could be merged. That would help me a lot, because we use mailhog for testing of services which are sending a lot of mails. This is a bit boring, since no sorting is supported yet.

[gedge]

can this be a PR into the vendored repo, please? Mailhog-server should get this change first

[AlexHimself]

I think I put the fix in manually and compiled it for those who need date sorting like I did.

This is my first time touching GO, GOX, make, etc. I just downloaded the repo, put in the code fix, Googled how the tools worked, smashed lots of buttons, and eventually managed to get it to spit compiled executables out that seem to resolve the sorting in about an hour. I make no guarantees, but so far so good! If it doesn't work for you, I'm not really going to put more time into it, but hopefully it does.

Without email sort, it was a deal breaker for me.

https://github.com/AlexHimself/MailhogDateSortFixed

[afaianswq]

Dear MailHog authors, can you please accept this MR?

[JohnMDavisSCD]

Using on Windows Server 2016 64-bit

git clone https://github.com/mailhog/MailHog.git
cd MailHog/
go mod init
go mode tidy
go get github.com/mailhog/MailHog
go mod vendor
{{insert changes from [linsomniac:master]}}
go build

works great!

[romikoops]

Hey guys, when the PR will be merged? Now it is total mess without proper sorting in Maildir mode