Add autossh formula, with fixed rscreen command

The rscreen command annoyingly overrides the
escape key to ^z, which is fixed in a patch. The
rest of the default settings should be fine for
most people

Formula/autossh.rb

@@ -0,0 +1,30 @@
+require 'formula'
+
+class Autossh <Formula
+  url 'http://www.harding.motd.ca/autossh/autossh-1.4b.tgz'
+  homepage 'http://www.harding.motd.ca/autossh/'
+  md5 '8f9aa006f6f69e912d3c2f504622d6f7'
+
+  def patches
+    DATA
+  end
+
+  def install
+    system "./configure", "--prefix=#{prefix}", "--disable-debug", "--disable-dependency-tracking"
+    system "make install"
+    bin.install 'rscreen'
+  end
+end
+
+
+__END__
+diff --git a/rscreen b/rscreen
+index f0bbced..ce232c3 100755
+--- a/rscreen
++++ b/rscreen
+@@ -23,4 +23,4 @@ fi
+ #AUTOSSH_PATH=/usr/local/bin/ssh
+ export AUTOSSH_POLL AUTOSSH_LOGFILE AUTOSSH_DEBUG AUTOSSH_PATH AUTOSSH_GATETIME AUTOSSH_PORT
+ 
+-autossh -M 20004 -t $1 "screen -e^Zz -D -R"
++autossh -M 20004 -t $1 "screen -D -R"