[Mingw-cross-env-list] curl update

[Mark Brand]

Hi,

Yesterday I pushed the update to curl 7.23, and I allowed curl.exe to be 
installed. I thought it would be nice to have a statically linked curl.exe.

If anybody is wondering why it doesn't seem to work, it turns out this 
curl version wants a CA .crt file even for insecure URLs. When it 
doesn't find one, it silently terminates. The easy workaround is to use 
the "-k, --insecure" option.

This behavior change has nothing to do with mingw-cross-env, but I hope 
this will help mingw-cross-env users avoid some frustration.

Mark