Ports: Switch to new ports system (#594)

Much redundancy is removed from package scripts with this system.
It also supports simple dependency management, uninstalling (through
BSD ports style plist files), cleaning up after itself (with clean,
clean_dist, clean_all commands), etc.

Ports/bash/package.sh

@@ -0,0 +1,12 @@
+#!/bin/bash ../.port_include.sh
+port=bash
+version=5.0
+useconfigure=true
+configopts="--disable-nls --without-bash-malloc"
+files="https://ftp.gnu.org/gnu/bash/bash-5.0.tar.gz bash-5.0.tar.gz"
+
+build() {
+    run_replace_in_file "s/define GETCWD_BROKEN 1/undef GETCWD_BROKEN/" config.h
+    run_replace_in_file "s/define CAN_REDEFINE_GETENV 1/undef CAN_REDEFINE_GETENV/" config.h
+    run make $makeopts
+}