unable to ./configure with bundled tests for ldns version.
- ldns is 1.6.16
- bundled tests ACX_LDNS_NOT doesn't add $LDNS_INCLUDES in compile command
=> test fails unable to #include <ldns/ldns.h>
Here is a patch to m4/acx_ldns.m4 to generate a working configure script.
I also join a (simpler) patch to existing configure, useless with m4 patch but simpler to understand the problem I encoutered.