Update patches to handle a newer version of Unicorn

[ericstewart]

Unicorn has changed a bit since the original patch was created it seems.

[tra]

I'm not using unicorn, what problems/backtraces can you share?

[ericstewart]

Sure. When running under Unicorn (in my case 3.5.0 but I also tried on 4.1.1) the existing patch code produces the following trace:

/Users/estewart/.rvm/gems/ree-1.8.7-2011.03/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:131:in `const_missing': uninitialized constant Unicorn::HttpParser::REQ (NameError)
    from /Users/estewart/.rvm/gems/ree-1.8.7-2011.03/bundler/gems/spawn-5cf7fd30e343/lib/patches.rb:60
    from /Users/estewart/.rvm/gems/ree-1.8.7-2011.03/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:182:in `require'
    from /Users/estewart/.rvm/gems/ree-1.8.7-2011.03/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:182:in `require'
    from /Users/estewart/.rvm/gems/ree-1.8.7-2011.03/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:547:in `new_constants_in'
    from /Users/estewart/.rvm/gems/ree-1.8.7-2011.03/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:182:in `require'
    from /Users/estewart/.rvm/gems/ree-1.8.7-2011.03/bundler/gems/spawn-5cf7fd30e343/lib/spawn.rb:25:in `included'
etc...

when it is included. This appears to be because Unicorn::HttpParser::REQ (or at least Unicorn::HttpRequest::REQ which the code references) is no longer there. It looks like it was removed from Unicorn way back in defunkt/unicorn@fe94d80 and has changed since then. Before it was a hash that was being cleared but now that is gone. I'm not sure the @request I added into this patch is even necessary so I can look at that a bit further, but the patch as is at least eliminates the error and works when forking.

These adjustments would support either variant but there may be some in-between that it doesn't handle correctly either. I'm just attempting to add support in for releases near the current release.

[tra]

Looks good, thanks for the patch!

[tra]

Also, be sure to look at issue 21... https://github.com/tra/spawn/issues/21