Master branch: Fix build, make possible to compile against old and new libmicrohttpd.

[hzeller]

The return codes of current libmicrohttpd changed from int
to MHD_Result at some point. Make it possible to be able to
compile against the old and the new version of libmicrohttpd.

Signed-off-by: Henner Zeller [email protected]

[hzeller]

The CI build failure seems unrelated to my changes. The build fails due to #include <catch2/catch.hpp> not found, which looks more like the CI is missing some dependencies.

[hzeller]

It looks like #299 did a similar change on the develop branch, but only partially: it uses the MHD_Result always (which will then only compile with newer versions, no older libmicrohttpd versions).

This change here makes things version-agnostic using #if MHD_VERSION >= 0x00097101.

[sisco0]

Also needed at my version 0x00097002, after changing the conditional typedef with that version everything works under my system.

/**
 * Current version of the library.
 * 0x01093001 = 1.9.30-1.
 */
#define MHD_VERSION 0x00097002

[hzeller]

Alright, changed to that version @sisco0

I did look around in the version history, and unfortunately, microhttpd had some discontinuation between versions 0x00097001 and 0x00097002. When the enum was introduced the version was temporarily warped back from 0x00097002 to 0x00097001, possibly due to merging issues.
Anyway, using 0x00097002 is probably the best choice with minimal issues.

[cinemast]

Thanks a lot! Sorry about the broken builds. I really need to fix that.