Adapting OS400 build scripts to new features: new curlbuild.h file and soname in VERSION --> VERSIONINFO

used to get built < 7.19.0 so we enforce an soname bump and display a warning

the name of the curl_off_t data type used now becomes CURL_TYPEOF_CURL_OFF_T

CURL_OFF_T -> CURL_TYPEOF_CURL_OFF_T

x_typeof -> curl_typeof_curl_off_t
x_sizeof -> curl_sizeof_curl_off_t
x_format -> curl_format_curl_off_t
u_format -> curl_format_curl_off_tu

The effective result of this commit is revision 1.72 plus two changed lines. These
can be viewed in http://cool.haxx.se/cvs.cgi/curl/lib/mprintf.c.diff?r1=1.72&r2=1.77

  CURLOPT_FAILONERROR with FTP to detect if a file exists or not, but it is
  not working: http://curl.haxx.se/mail/lib-2008-07/0295.html

an SONAME bump.

This error did not cause test failures on systems where sizeof(int) == sizeof(long).

  firefox-db2pem.sh conversion script that converts a local Firefox db of ca
  certs into PEM format, suitable for use with a OpenSSL or GnuTLS built
  libcurl.

  interface, and the proxy would send Connection: close during the
  authentication phase.  http://curl.haxx.se/bug/view.cgi?id=2069047

< 7.19.0 to >= 7.19.x

been killed.

which caused an error when the second header was dumped due to stdout
being closed.  Added test case 1066 to verify.  Also fixed a potential
problem where a closed file descriptor might be used for an upload
when more than one URL is given.

      http://curl.haxx.se/mail/archive-2008-08/0075.html

support is provided using WIN32 functions directly.

this really hasn't bitten anyone else. The issuer of the report (Felix) suggested
the closure himself and he will get back when (if?) he manage to get a more
reliable way to see the problem.

154 - bug #2041827 "Segfault in http_output_auth w/ FORBID_REUSE (7.18.2)"