以前から、何気なくWEBページをダウンロードするのに使っていたgnu wgetのWindowsバイナリだが、HTTP/1.0 を使っているようだ。

console
> wget.exe -V GNU Wget 1.10.2 Copyright (C) 2005 Free Software Foundation, Inc. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
console
> wget test.xxxxxxxxx.com GET / HTTP/1.0 User-Agent: Wget/1.10.2 Accept: */* Host: test.xxxxxxxxx.com Connection: Keep-Alive

調べてみると、wget 1.13からHTTP/1.1に対応しているみたい。
Windowsバイナリも発見。(リンク切れです)
http://sourceforge.jp/projects/sfnet_ezwinports/downloads/wget-1.13.4-w32-bin.zip/

こちらにあるようです。(2017.07.15)
https://eternallybored.org/misc/wget/

Windows binaries of GNU Wget

A command-line utility for retrieving files using HTTP, HTTPS and FTP protocols.

console
> wget.exe -V GNU Wget 1.13.4 built on mingw32. +digest +https +ipv6 +iri -large-file +nls -ntlm +opie +ssl/gnutls Wgetrc: d:/usr/etc/wgetrc (system) Locale: d:/usr/share/locale Compile: gcc -DHAVE_CONFIG_H -DSYSTEM_WGETRC="/d/usr/etc/wgetrc" -DLOCALEDIR="/d/usr/share/locale" -I. -I../lib -I../lib -D_WIN32_WINNT=0x0501 -I/d/usr/include -Wall -O2 -ggdb -g3 Link: gcc -Wall -O2 -ggdb -g3 /d/usr/lib/libiconv.dll.a -L/d/usr/lib /d/usr/lib/libintl.dll.a /d/usr/lib/libiconv.dll.a -L/d/usr/lib /d/usr/lib/libgnutls.dll.a -L/d/usr/lib /d/usr/lib/libnettle.dll.a /d/usr/lib/libhogweed.dll.a /d/usr/lib/libgmp.dll.a /d/usr/lib/libz.dll.a /d/usr/lib/libws2_32.a /d/usr/lib/libp11-kit.dll.a /d/usr/lib/libintl.dll.a /d/usr/lib/libiconv.dll.a -L/d/usr/lib -lz -lws2_32 -lidn ftp-opie.o mswindows.o gnutls.o ../lib/libgnu.a Copyright (C) 2009 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://www.gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.

試してみるとちゃんとHTTP/1.1ヘッダが出ている。

console
> wget test.xxxxxxxxx.com GET / HTTP/1.1 User-Agent: Wget/1.13.4 (mingw32) Accept: */* Host: test.xxxxxxxxx.com Connection: Keep-Alive

はて、今までWindowsでwgetを使っていた時、name baseのvirtual hostの取得はうまく行ってたんだろうか...忘れよう。