VMS: Updates for 0740-0D1220

lib/setup-vms.h : VAX HP OpenSSL port is ancient, needs help.
                  More defines to set symbols to uppercase.

src/tool_main.c : Fix parameter to vms_special_exit() call.

packages/vms/ :
  backup_gnv_curl_src.com : Fix the error message to have the correct package.

  build_curl-config_script.com : Rewrite to be more accurate.

  build_libcurl_pc.com : Use tool_version.h now.

  build_vms.com : Fix to handle lib/vtls directory.

  curl_gnv_build_steps.txt : Updated build procedure documentation.

  generate_config_vms_h_curl.com :
       * VAX does not support 64 bit ints, so no NTLM support for now.
       * VAX HP SSL port is ancient, needs some help.
       * Disable NGHTTP2 for now, not ported to VMS.
       * Disable UNIX_SOCKETS, not available on VMS yet.
       * HP GSSAPI port does not have gss_nt_service_name.

  gnv_link_curl.com : Update for new curl structure.

  pcsi_product_gnv_curl.com : Set up to optionally do a complete build.