unicorn 0.97.0 - polishing and cleaning up
A bunch of small fixes related to startup/configuration and hot
reload issues with HUP:
* Variables in the user-generated config.ru files no longer
risk clobbering variables used in laucher scripts.
* signal handlers are initialized before the pid file is
dropped, so over-eager firing of init scripts won't
mysteriously nuke a process.
* SIGHUP will return app to original state if an updated
config.ru fails to load due to {Syntax,Load}Error.
* unicorn_rails should be Rails 3 compatible out-of-the-box
('unicorn' works as always, and is recommended for Rails 3)
* unicorn_rails is finally "working_directory"-aware when
generating default temporary paths and pid file
* config.ru encoding is the application's default in 1.9,
not forced to binary like many parts of Unicorn.
* configurator learned to handle the "user" directive outside
of after_fork hook (which will always remain supported).
There are also various internal cleanups and possible speedups.