fix socket data type

fix socket data type and logging format in debug tracking socket functions

convert Curl_ultous() and Curl_ultouc() functions to curlx_ultous() and
curlx_ultouc(), exposing them through curlx.h to allow proper code reuse
later in our test harness.

updated sources

- 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.

add header inclusion

fix compiler warning

fix compiler warning

  properly in angle brackets. Recipients provided with CURLOPT_MAIL_RCPT now
  get angle bracket wrapping automatically by libcurl unless the recipient
  starts with an angle bracket as then the app is assumed to deal with that
  properly on its own.

  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.

fix compiler warning

fix compiler warning

fix compiler warning

fix compiler warning

fix compiler warning

- To allow an app to force a re-read of /etc/resolv.conf etc, pretty much
  like the res_init() resolver function offers

replaced tabs with spaces

fix Content-Length validation

fix compiler warning: conversion from "long" to "size_t" may lose sign

fix compiler warning: conversion from "long" to "size_t" may lose sign

  http://curl.haxx.se/mail/lib-2009-10/0024.html
  http://curl.haxx.se/bug/view.cgi?id=2944325

removed trailing whitespace

fix compiler warning

Overhauled test suite getpart() function. Fixing potential out of bounds
stack and memory overwrites triggered with huge test case definitions.

  (http://curl.haxx.se/bug/view.cgi?id=2951319)

moved gethostbyname_thread() to #else case to avoid 'not used' compiler warning.

  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.

_ Upgrade OS400 EBCDIC wrappers for new options.
_ Upgrade ILE/RPG bindings to current state.

mention last changes