examples: Updated SMTP examples to set CURLOPT_UPLOAD
examples: Corrected incorrect indentation in smtp-multi.c
examples: Updated copyright year for recent edits
mprintf: Replaced internal usage of FORMAT_OFF_T and FORMAT_OFF_TU

Following commit 0aafd77fa4c6f2, replaced the internal usage of
FORMAT_OFF_T and FORMAT_OFF_TU with the external versions that we
expect API programmers to use.

This negates the need for separate definitions which were subtly
different under different platforms/compilers.
imap: Fixed line length warning
examples: Added SMTP email verification example
examples: Added SMTP EXPN command example
examples: Rename before adding additional email examples
examples: Updated IMAP fetch example for libcurl 7.30.0
examples: Added IMAP LIST mailbox example
RELEASE-NOTES: Synced with 7de2e032584d44
examples: Added IMAP STORE example
examples: Added IMAP APPEND example
examples: Update SMTP TLS example mail content to be RFC-2821 compliant

...and made some minor coding style changes to better match the curl
coding standards as well as the other email related examples.
examples: Corrected unescaped backslash in imap-store.c
OpenSSL: Fix forcing SSLv3 connections

Since ad34a2d5c87c7f4b14e8dded3 (present in 7.34.0 release) forcing
SSLv3 will always return the error "curl: (35) Unsupported SSL protocol
version" Can be replicated with `curl -I -3 https://www.google.com/`.
This fix simply allows for v3 to be forced.
examples: Updated SMTP multi example to be more realistic

Updated the contents of the email and payload callback as per the IMAP
and other SMTP examples.
CMakeLists.txt: add warning about the cmake build's state
CMakeLists.txt: add standard curl source code header
Fix NetWare build for vtls files.