draft release notes (so far) for upcoming 0.93.0

[Eric Wong <normalperson@yhbt.net>]

The one minor bugfix is only for users who set RAILS_RELATIVE_URL_ROOT
in a config file.  Users of the "--path" switch or those who set the
environment variable in the shell were unaffected by this bug.  Note
that we still don't have relative URL root support for Rails < 2.3, and
are unlikely to bother with it unless there is visible demand for it.  I
didn't even know people used/cared for relative URL roots before today
(it was a Rails 2.3.4 user).

New features (so far) includes support for :tries and :delay when
specifying a "listen" in an after_fork hook.  This was inspired by Chris
Wanstrath's example of binding per-worker listen sockets in a loop while
migrating (or upgrading) Unicorn.  Setting a negative value for :tries
means we'll retry the listen indefinitely until the socket becomes
available.

So you can do something like this in an after_fork hook:

    after_fork do |server,worker|
      addr = "127.0.0.1:#{9293 + worker.nr}"
      server.listen(addr, :tries => -1, :delay => 5)
    end

There's also the usual round of added documentation, packaging fixes,
code cleanups and minor performance improvements that are viewable
in the git log....

Shortlog since v0.92.0 (so far) below:

Eric Wong (45):
      build: hardcode the canonical git URL
      build: manifest dropped manpages
      build: smaller ChangeLog
      doc/LATEST: remove trailing newline
      http: don't force -fPIC if it can't be used
      .gitignore on *.rbc files Rubinius generates
      README/gemspec: a better description, hopefully
      GNUmakefile: add missing .manifest dep on test installs
      Add HACKING document
      configurator: fix user switch example in RDoc
      local.mk.sample: time and perms enforcement
      unicorn_rails: show "RAILS_ENV" in help message
      gemspec: compatibility with older Rubygems
      Split out KNOWN_ISSUES document
      KNOWN_ISSUES: add notes about the "isolate" gem
      gemspec: fix test_files regexp match
      gemspec: remove tests that fork from test_files
      test_signals: ensure we can parse pids in response
      GNUmakefile: cleanup test/manifest generation
      util: remove APPEND_FLAGS constant
      http_request: simplify and remove handle_body method
      http_response: simplify and remove const dependencies
      local.mk.sample: fix .js times
      TUNING: notes about benchmarking a high :backlog
      HttpServer#listen accepts :tries and :delay parameters
      "make install" avoids installing multiple .so objects
      Use Configurator#expand_addr in HttpServer#listen
      configurator: move initialization stuff to #initialize
      Remove "Z" constant for binary strings
      cgi_wrapper: don't warn about stdoutput usage
      cgi_wrapper: simplify status handling in response
      cgi_wrapper: use Array#concat instead of +=
      server: correctly unset reexec_pid on child death
      configurator: update and modernize examples
      configurator: add colons in front of listen() options
      configurator: remove DEFAULT_LOGGER constant
      gemspec: clarify commented-out licenses section
      Add makefile targets for non-release installs
      cleanup: use question mark op for 1-byte comparisons
      RDoc for Unicorn::HttpServer::Worker
      small cleanup to pid file handling + documentation
      rails: RAILS_RELATIVE_URL_ROOT may be set in Unicorn config
      unicorn_rails: undeprecate --path switch
      manpages: document environment variables
      README: remove reference to different versions

-- 
Eric Wong