mime_state is now a typedef.

curl_mime_encoder() is operational and documented.
curl tool -F option is extended with ";encoder=".
curl tool --libcurl option generates calls to curl_mime_encoder().
New encoder tests 648 & 649.
Test 1404 extended with an encoder specification.

... and slightly edited to follow our code style better.

Up2date versions of OpenSSL maintain the default reasonably secure
without breaking compatibility, so it is better not to override the
default by curl.  Suggested at https://bugzilla.redhat.com/1483972

Closes #1846

...for curl-config and its corresponding test 1014

Added test 1904 to verify.

Reported-by: Lawrence Wagerfield
Fixes #1859
Closes #1860

... to a README file that doesn't exist anymore

and some minor whitespace fixes

... not *CACERT_BADFILE as it isn't really because of a bad file.

Bug: https://curl.haxx.se/mail/lib-2017-09/0002.html
Closes #1858

... since people copy and paste code from this example and thus they get
an inefficient POST operation without a good reason and sometimes
without understanding why.

Instead this now returns as much data as possible.

... as the other functions. Makes it easier to machine-parse!

As it was added to multi.h simply to not break test 1135, which now has
been disabled due to the mime API addition anyway and su we can now move
the sslset stuff to where the other curl_global_* prototypes are.

Use and generate CURL_ZERO_TERMINATED in curl tool and tests.

To support telling a string is nul-terminated, symbol CURL_ZERO_TERMINATED
has been introduced.

Documentation updated accordingly.

symbols in versions updated. Added form API symbols deprecation info.

This feature is badly supported in Windows: as a replacement, a caller has
to use curl_mime_data_cb() with fread, fseek and possibly fclose
callbacks to process opened files.

The cli tool and documentation are updated accordingly.

The feature is however kept internally for form API compatibility, with
the known caveats it always had.

As a side effect, stdin size is not determined by the cli tool even if
possible and this results in a chunked transfer encoding. Test 173 is
updated accordingly.

Additional mime-specific tests.
Existing tests updated to reflect small differences (Expect: 100-continue,
data size change due to empty lines, etc).
Option -F headers= keyword added to tests.
test1135 disabled until the entry point order change is resolved.
New example smtp-mime.
Examples postit2 and multi-post converted from form API to mime API.

Extended -F option syntax to support multipart mail messages.
-F keyword headers= added to include custom headers in parts.
Documentation upgraded.

Available in HTTP, SMTP and IMAP.
Deprecates the FORM API.
See CURLOPT_MIMEPOST.
Lib code and associated documentation.

Shell profile output makes the SSH server failing and this problem reason
is not easy to find when no hint is given.

The case keyword may be followed by a constant expression and thus should
allow it to start with an open parenthesis.

This enables tests to create more than one file on the client side.

This will allow substitution of boundaries in mail messages.

Some calls in different modules were setting the data handle to NULL, causing
segmentation faults when using builds that enable character code conversions.