Need the ability to pass erl command args at startup.

[Damien Katz <da...@yahoo.com>]

We need the ability to pass couchdb command line args down to the  
erlang vm. Something like:

$ ./couchdb -erl "-sname foo"

And when the erlang vm is run, it passes "-sname foo" in with the  
startup arguments.

We'll need this for configuring erlang distributed computing, and need  
this for testing vm optimizations.

It's not a showstopper, for now just I'm editing the couchdb script  
file directly. But this is definitely a nice to have as more people  
will want to tweak their own installations.

-Damien