[Couchdb Wiki] Update of "ExternalProcesses" by JarrodRoberson

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The "ExternalProcesses" page has been changed by JarrodRoberson.
http://wiki.apache.org/couchdb/ExternalProcesses?action=diff&rev1=12&rev2=13

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  }}}
  A Java example can be found here: http://daily.profeth.de/2009/12/apache-couchdb-external-process-using.html
  
+ '''Notes for developing external handlers'''
+ 
+ When developing handlers you need to restart CouchDB after each change as it doesn't see the changes until you restart the server.
+ 
+ '''Notes for OSX users:'''
+ 
+ if you are using launchctl to load and unload your CouchDB instance, it by default starts the couchdb instance with user couchdb. External handlers won't run if they are not executable by this user. Calls to them will fail with a 'OS Process timeout' error stack trace from Erlang. If you start couchdb with sudo couchdb things will work fine.
+