checking /usr/local/bin/curl-config... yes
configure: error:

  You have decided to build unrealIRCd with libcURL (remote includes) support.
  However, you have disabled system-installed c-ares support (--with-system-cares).
  Because UnrealIRCd will use a bundled copy of c-ares which may be incompatible
  with the system-installed libcURL, this is a bad idea which may result in error
  messages looking like:

        ``[error] unrealircd.conf:9: include: error downloading '(http://example.net/ex.conf)': Could not resolve host: example.net (Successful completion)''

  Or UnrealIRCd might even crash.

  Please build UnrealIRCd with --with-system-cares when enabling --enable-libcurl