libcoap 4.1.2

upstream moved to GitHub

Closes #17896.

Signed-off-by: ilovezfs <ilovezfs@icloud.com>

Formula/libcoap.rb

@@ -1,8 +1,8 @@
 class Libcoap < Formula
   desc "Lightweight application-protocol for resource-constrained devices"
-  homepage "https://libcoap.sourceforge.io"
-  url "https://downloads.sourceforge.net/project/libcoap/coap-18/libcoap-4.1.1.tar.gz"
-  sha256 "20cd0f58434480aa7e97e93a66ffef4076921de9687b14bd29fbbf18621bd394"
+  homepage "https://github.com/obgm/libcoap"
+  url "https://github.com/obgm/libcoap/archive/v4.1.2.tar.gz"
+  sha256 "f7e26dc232c177336474a14487771037a8fb32e311f5ccd076a00dc04b6d7b7a"
 
   bottle do
     cellar :any_skip_relocation
@@ -14,14 +14,16 @@ class Libcoap < Formula
     sha256 "bf67c05965270e3fd2ce47a3c3832ee9119f75ca06087978041277dd1425f72a" => :mountain_lion
   end
 
-  depends_on "doxygen" => :build
+  depends_on "autoconf" => :build
+  depends_on "automake" => :build
+  depends_on "libtool" => :build
+  depends_on "pkg-config" => :build
 
   def install
-    system "./configure", "--prefix=#{prefix}"
+    system "./autogen.sh"
+    system "./configure", "--prefix=#{prefix}",
+                          "--disable-examples"
     system "make"
-
-    include.install "coap.h"
-    lib.install "libcoap.a"
-    bin.install "examples/coap-server", "examples/coap-client"
+    system "make", "install"
   end
 end