Re: [PATCH v2 1/5] http: drop support for curl < 7.11.1

> From: Jeff King <peff@peff.net>
>
> Drop support for this ancient version of curl and simplify the code by
> allowing us get rid of some "#ifdef"'s.
>
> Git will not build with vanilla curl older than 7.11.1 due to (at
> least) two issues:
>
>   - our use of CURLOPT_POSTFIELDSIZE in 37ee680d9b
>     (http.postbuffer: allow full range of ssize_t values,
>     2017-04-11). This field was introduced in curl 7.11.1.
>
>   - our use of CURLPROTO_* outside any #ifdef in aeae4db174
>     (http: create function to get curl allowed protocols,
>     2016-12-14). These were introduced in curl 7.19.4.
>
> We could solve these compilation problems with more #ifdefs,
> but it's not worth the trouble. Version 7.11.1 came out in
> March of 2004, over 13 years ago. Let's declare that too old

> and drop any existing ifdefs that go further back. One
> obvious benefit is that we'll have fewer conditional bits
> cluttering the code.
>
> This patch drops all #ifdefs that reference older versions
> (note that curl's preprocessor macros are in hex, so we're
> looking for 070b01, not 071101).