[ANN] update to libSMTP

[Shao Sean]

there was a small bug with the mime boundaries when attachments were sent
with the email.. the majority of email clients will work around the bug, but
a few email clients will not work around the bug and attachments will not be
shown to the user..

just a few lines of internal code have changed and you can safely swap the
v1.1.0 library with the new v1.1.1 library available on my website..

--
Shao Sean
http://www.shaosean.tk/