Begin the swtch to Homebrew...

Tweak the Makefile a bit.
Use pkg-config on OS-X, too.
More buildsystem tweaks...

In preparation of the death of the OpenSSL codepath
Bye bye OpenSSL!

Kill the OpenSSL codepath
Bye bye MacPorts!

Kill our custom MacPorts ports
Fix GMP download URL
Fix GMP download URL, bis
Fix libarchive-git build

Switch to CMake
libarchive-git build tweaks...

Play with CMake some more…