rsnapshot: fix pod2man error, update head

Fixes Homebrew/homebrew#33636.

Formula/rsnapshot.rb

@@ -1,16 +1,35 @@
-require 'formula'
+require "formula"
 
 class Rsnapshot < Formula
-  homepage 'http://rsnapshot.org'
-  url 'http://rsnapshot.org/downloads/rsnapshot-1.3.1.tar.gz'
-  sha1 'a3aa3560dc389e1b00155a5869558522c4a29e05'
+  homepage "http://rsnapshot.org"
 
-  head 'cvs://:pserver:anonymous:@rsnapshot.cvs.sourceforge.net:/cvsroot/rsnapshot:rsnapshot'
+  stable do
+    url "http://rsnapshot.org/downloads/rsnapshot-1.3.1.tar.gz"
+    sha1 "a3aa3560dc389e1b00155a5869558522c4a29e05"
+
+    # Fix pod2man error; docs in HEAD do not have this problem
+    patch :DATA
+  end
+
+  head "https://github.com/DrHyde/rsnapshot.git"
 
   def install
-    system "./configure", "--disable-debug", "--disable-dependency-tracking",
-                          "--prefix=#{prefix}",
-                          "--mandir=#{man}"
-    system "make install"
+    system "./configure", "--prefix=#{prefix}", "--mandir=#{man}"
+    system "make", "install"
   end
 end
+
+__END__
+diff --git a/rsnapshot-program.pl b/rsnapshot-program.pl
+index dfd7ef6..72de4af 100755
+--- a/rsnapshot-program.pl
++++ b/rsnapshot-program.pl
+@@ -6666,6 +6666,8 @@ additional disk space will be taken up.
+ 
+ =back
+ 
++=back
++
+ Remember that tabs must separate all elements, and that
+ there must be a trailing slash on the end of every directory.
+