liboauth: use Homebrew openssl

Formula/liboauth.rb

@@ -4,6 +4,7 @@ class Liboauth < Formula
   homepage 'http://liboauth.sourceforge.net'
   url 'https://downloads.sourceforge.net/project/liboauth/liboauth-1.0.3.tar.gz'
   sha1 '791dbb4166b5d2c843c8ff48ac17284cc0884af2'
+  revision 1
 
   bottle do
     cellar :any
@@ -13,6 +14,8 @@ class Liboauth < Formula
     sha1 "f58f7890a6b3165fd4254ef921c0e85eeb73f810" => :mountain_lion
   end
 
+  depends_on "openssl"
+
   def install
     system "./configure", "--disable-dependency-tracking",
                           "--prefix=#{prefix}",