Add syslog-ng 3.0.8

Later version 3.1.2 fails to compile on OS X w/ missing symbol error.

Formula/syslog-ng.rb

@@ -0,0 +1,24 @@
+require 'formula'
+
+class SyslogNg <Formula
+  url 'http://www.balabit.com/downloads/files/syslog-ng/open-source-edition/3.0.8/source/syslog-ng_3.0.8.tar.gz'
+  homepage 'http://www.balabit.com/network-security/syslog-ng/'
+  md5 '7107f5758dec4b774136f0f827b35258'
+
+  depends_on 'pkg-config'
+  depends_on 'pcre'
+  depends_on 'eventlog'
+
+  def patches
+    { :p0 =>
+      "http://trac.macports.org/export/70550/trunk/dports/sysutils/syslog-ng/files/patch-src-Makefile.in.diff"
+    }
+  end
+
+  def install
+    system "./configure", "--disable-debug", "--disable-dependency-tracking",
+                          "--enable-dynamic-linking",
+                          "--prefix=#{prefix}"
+    system "make install"
+  end
+end