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.

- 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

replaced tabs with spaces

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

removed trailing whitespace

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.

  to automatically uncompress it with the CURLOPT_ENCODING option, libcurl
  could wrongly provide the callback with more data than what the maximum
  documented amount. An application could thus get tricked into badness if the
  maximum limit was trusted to be enforced by libcurl itself (as it is
  documented).

  This is further detailed and explained in the libcurl security advisory
  20100209 at

    http://curl.haxx.se/docs/adv_20100209.html

OOM handling fix

OOM handling fix

- avoid OpenSSL 0.9.8 ENGINE_by_id memory leak

- cleanup parenthesis usage in return statements

- attempt to workaround icc 9.1 optimizer issue

fix printf-style format strings

Fix compiler warning: unused variable

Makefile.inc since that can't be included directly.

Fix OOM handling

Fix portability issue related with unaligned memory access

Fix compiler warnings: conversion from 'const int ' to 'unsigned char ', possible loss of data

Fix compiler warning: conditional expression is constant

Fix compiler warning: local variable may be used without having been initialized.

Fix compiler warnings: conversion from 'const int ' to 'unsigned char ', possible loss of data

Fix compiler warning: variable was set but never used

Simplify preprocessor symbol checking

slightly while editing

Conroy's fix to make the code match with the RTP documentation regarding
writing out the whole header. The docs say it writes the whole header,
but the code (before this patch) did not write out the leading $.