- Resurrect, unbreak, and update to version 2020.02 (Catalpa)

- The build is purely CMake-based now and doesn't use any shell
  or Python helper scripts
- Keep PLIST_SUB+=COIN="" to reduce the churn on the pkg-plist,
  will be cleaned up separately (COIN support is now mandatory)
- Chase 301 Moved Permanently redirect in the WWW line of the
  port description while here

math/ogdf/files/patch-include_ogdf_basic_System.h

@@ -0,0 +1,20 @@
+--- include/ogdf/basic/System.h.orig	2015-05-29 15:36:24 UTC
++++ include/ogdf/basic/System.h
+@@ -53,7 +53,7 @@
+ #define OGDF_SYSTEM_H
+ 
+ 
+-#if defined(OGDF_SYSTEM_OSX)
++#if defined(OGDF_SYSTEM_OSX) || defined(OGDF_SYSTEM_FREEBSD)
+ #include <stdlib.h>
+ #elif defined(OGDF_SYSTEM_UNIX) || defined(__MINGW32__)
+ #include <malloc.h>
+@@ -176,7 +176,7 @@ public:
+ # else
+ 		return _aligned_malloc(size, 16);
+ # endif
+-#elif defined(OGDF_SYSTEM_OSX)
++#elif defined(OGDF_SYSTEM_OSX) || defined(OGDF_SYSTEM_FREEBSD)
+ 		// malloc returns 16 byte aligned memory on OS X.
+ 		return malloc(size);
+ #else