New formula: libwebsockets-1.22

Libwebsockets is the main C library implementation of the latest websockets protocol.

Refs #16221.

Library/Formula/libwebsockets.rb

@@ -0,0 +1,20 @@
+require 'formula'
+
+class Libwebsockets < Formula
+  homepage 'http://git.warmcat.com/cgi-bin/cgit/libwebsockets'
+  url 'http://git.warmcat.com/cgi-bin/cgit/libwebsockets/snapshot/libwebsockets-1.22-chrome26-firefox18.tar.gz'
+  version '1.22'
+  sha1 'e1bc750cf206699a7fbafc59db82c33c49948680'
+
+  depends_on 'cmake' => :build
+
+  def install
+    system "cmake", ".", *std_cmake_args
+    system "make"
+
+    # The `make install` target doesn’t work (FFS) so here’s what I think
+    # should be installed:
+    lib.install 'lib/libwebsockets.dylib'
+    include.install 'lib/libwebsockets.h'
+  end
+end