Dependencies generated from $(CSOURCES).

a URL-encoded path is used.

stat(), fstat() and lseek().

of struct_stat in formdata.c as well, to support formpost uploads of large
files on Windows too

Ref. lib/file.c.

SKIPPED stuff in the short output. Some platforms get quite a lot of SKIPPED
and they don't add much value and only clutter screen space.

formpost (including a file upload part) was aborted before the whole file was
sent.

connection.

ssluse.*: Added SSL_strerror(). Curl_SSL_engines_list() now returns a slist
which must be freed by caller.

the others remain at previous values.

UrlState sub-struct. Also made the engine_list exist for non-ssl builds to
make curl build.