Switch to new download format and update package scripts

pkg.info

@@ -1,11 +1,24 @@
 name: zsh
 description: A powerful interactive shell
-version: 5.9
-revision: 2
+version: "5.9"
+revision: 3
 url: https://www.zsh.org/
 license: custom
+maintainers:
+  - [email protected]
 architecture: any
-keep: ["etc/zsh/"]
-make_depends: ["texinfo","libcap","gdbm","libcap"]
-provides: ["sh"]
 type: source
+keep:
+  - etc/zsh/
+make_depends:
+  - texinfo
+  - libcap
+  - gdbm
+  - libcap
+provides:
+  - sh
+downloads:
+  - url: https://downloads.sourceforge.net/project/zsh/zsh/${BPM_PKG_VERSION}/zsh-${BPM_PKG_VERSION}.tar.xz
+    extract_to: ${BPM_SOURCE}
+    extract_strip_components: 1
+    checksum: 9b8d1ecedd5b5e81fbf1918e876752a7dd948e05c1a0dba10ab863842d45acd5