HTTP/1.0 HTTP/1.1 wget

force-response-1.0
This forces an HTTP/1.0 response to clients making an HTTP/1.0 request. It was originally implemented as a result of a problem with AOL's proxies. Some HTTP/1.0 clients may not behave correctly when given an HTTP/1.1 response, and this can be used to interoperate with them.

http://httpd.apache.org/docs/2.4/en/env.html

wgetは1.13.3以降でHTTP/1.1対応

** Support HTTP/1.1

https://lists.gnu.org/archive/html/info-gnu/2011-08/msg00018.html

HTTP/1.0版のwgetは、ApacheからのHTTP/1.1応答を
正しく処理できないことがあるのでforce-response-1.0を設定する

BrowserMatch ^Wget/1\.1[0-2] force-response-1.0