OC-7481: chef-server-core: less the webui + unicorn
OC-7481: disable the webui by default in chef-server-core

Since the webui is not installed, we can't configure it.

Down the road we'll have to revist how we do this when we no longer ship the webui with the API server by default.
Clean up crufty upgrade instructions

Apparently OSC doesn't have a chef-server-ctl upgrade and we don't use /etc/opscode
OC-7481: Look for both single and double quoted ruby strings
shell redirection fixes and directory creation

* Create /etc/chef-server if it doesn't exist.
  Ideally this should be our job, but it works.
* Use >/dev/null 2>&1 for redirection of stdout and stderr.
  &> is a bashism and doesn't work with posix shells (dash)
  >/dev/null 2>/dev/null works too.
  2>&1 >/dev/null <-- does not correctly redirect stderr
Merge pull request #2 from opscode/chef-server-core

chef-server-core: less the webui + unicorn