its pkg-config file. So -Wl stuff ended up in the .pc file, which is really
bad, and breaks if there are multiple -Wl in our LDFLAGS (which are in
PTXdist). bug #2893592 (http://curl.haxx.se/bug/view.cgi?id=2893592)
file for libcurl, and while doing that fix he unified with curl-config.in
how the supported protocols and features are extracted and used, so both those
tools should now always be synced.