couchdb: fix potential problem with download, add plist info in caveats

Signed-off-by: David Höppner <0xffea@gmail.com>

Formula/couchdb.rb

@@ -1,9 +1,10 @@
 require 'formula'
 
 class Couchdb <Formula
-  url 'git://github.com/apache/couchdb.git', :tag => "1.0.1"
+  url 'http://github.com/apache/couchdb/tarball/1.0.1'
   homepage "http://couchdb.apache.org/"
   version "1.0.1"
+  md5 'f2ea23caacff482afe44e29a3f8b7685'
 
   depends_on 'spidermonkey'
   depends_on 'icu4c'
@@ -26,4 +27,19 @@ class Couchdb <Formula
 
   end
 
-end
+  def caveats; <<-EOS.undent
+    If this is your first install, automatically load on login with:
+        cp #{prefix}/Library/LaunchDaemons/org.apache.couchdb.plist ~/Library/LaunchAgents
+        launchctl load -w ~/Library/LaunchAgents/org.apache.couchdb.plist
+
+    If this is an upgrade and you already have the com.mysql.mysqld.plist loaded:
+        launchctl unload -w ~/Library/LaunchAgents/org.apache.couchdb.plist
+        cp #{prefix}/Library/LaunchDaemons/org.apache.couchdb.plist ~/Library/LaunchAgents
+        launchctl load -w ~/Library/LaunchAgents/org.apache.couchdb.plist
+
+    Or start manually with:
+        couchdb
+    EOS
+  end
+
+end