SMTP in multi mode: use Curl_ssl_connect_nonblocking() when connecting.

Implement SMTP authentication

fixed compiler warnings

fix smtp compile warning

Use ssize_t instead of int for the Curl_smtp_escape_eob nread
argument.

Signed-off-by: Ben Greear <greearb@candelatech.com>

remove the CVSish $Id$ lines

- Proper handling of STARTTLS on SMTP, taking CURLUSESSL_TRY into account.
- SMTP falls back to RFC821 HELO when EHLO fails (and SSL is not required).
- Use of true local host name (i.e.: via

- Proper handling of STARTTLS on SMTP, taking CURLUSESSL_TRY into account.
- SMTP falls back to RFC821 HELO when EHLO fails (and SSL is not required).
- Use of true local host name (i.e.: via gethostname()) when available, as default argument to SMTP HELO/EHLO.
- Test case 804 for HELO fallback.

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- I made the SMTP code expect a 250 response back from the server after the
full DATA has been sent, and I modified the test SMTP server to also send
that response. As usual, the DONE ope

- I made the SMTP code expect a 250 response back from the server after the
full DATA has been sent, and I modified the test SMTP server to also send
that response. As usual, the DONE operation that is made after a completed
transfer is still not doable in a non-blocking way so this waiting for 250
is unfortunately made blockingly.

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- Jack Zhang reported a problem with SMTP: we wrongly used multiple addresses
in the same RCPT TO line, when they should be sent in separate single
commands. I updated test case 802 to ve

- Jack Zhang reported a problem with SMTP: we wrongly used multiple addresses
in the same RCPT TO line, when they should be sent in separate single
commands. I updated test case 802 to verify this.

- I also fixed a bad use of my_setopt_str() of CURLOPT_MAIL_RCPT in the curl
tool which made it try to output it as string for the --libcurl feature
which could lead to crashes.

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modified to get the EHLO domain from the path part of the URL instead of the
user name

moved the SMTP payload escape function into Curl_smtp_escape_eob and put
it in smtp.c

(SMTP) support DATA better in the server and make sure to "escape" CRLF.CRLF
sequences in uploaded data. The test server doesn't "decode" escaped dot-lines
but instead test cases must be writ

(SMTP) support DATA better in the server and make sure to "escape" CRLF.CRLF
sequences in uploaded data. The test server doesn't "decode" escaped dot-lines
but instead test cases must be written to take them into account. Added test
case 803 to verify dot-escaping.

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introducing IMAP, POP3 and SMTP support (still lots of polish left to do)