acme: Update to 2.7.9

Switch to codeload. Simplifies the Makefile.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

net/acme/Makefile

@@ -8,15 +8,14 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=acme
-PKG_VERSION:=2.7.8
-PKG_RELEASE:=4
+PKG_VERSION:=2.7.9
+PKG_RELEASE:=1
 PKG_LICENSE:=GPLv3
 
-PKG_SOURCE_PROTO:=git
-PKG_SOURCE_URL:=https://github.com/Neilpang/acme.sh
-PKG_SOURCE_VERSION:=521d8c4b1f374c52ab1452d399a4d4910465e9fe
-PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION)-$(PKG_RELEASE).tar.xz
-PKG_MIRROR_HASH:=03e24eb41513b4d28dc42f5ae5c91be0030094149cbdbf9cdf9b6f87db9e36c0
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
+PKG_SOURCE_URL:=https://codeload.github.com/Neilpang/acme.sh/tar.gz/$(PKG_VERSION)?
+PKG_HASH:=25f8eef1a53584e3ebc653e1ae7763362ca97c40bb476ab7fee01aa50fa3a101
+PKG_BUILD_DIR:=$(BUILD_DIR)/acme.sh-$(PKG_VERSION)
 PKG_MAINTAINER:=Toke Høiland-Jørgensen <toke@toke.dk>
 
 LUCI_DIR:=/usr/lib/lua/luci