At the same time implement synchronous wrappers of the POSIX functions.
These will be undocumented until we settle on an API. Works like this

    // returns promise as before
    posix.mkdir("test").addCallback(function () {
      sys.puts("done");
    });

    // returns undefined, executed synchronously.
    posix.mkdirSync("test");
    sys.puts("done");

This refactoring is a step towards allowing promises to be implemented
purely in javascript.

Some people were reporting waf erroring with

  thread.error: can't start new thread

this seems to fix that problem.

http://groups.google.com/group/nodejs/browse_thread/thread/b2edb76691b1848c

Refactored test suite to use the assert module for testing rather than
mjsunit.

added test case for HTTP duplicated header bug on keepalive

http://groups.google.com/group/nodejs/msg/f8e51a8e0c74bd85

Move the event loop calls into javascript.
Makes life so much easier.

Multipart parts kept the first chunk of data after their headers in
memory, even so that was no longer needed.

Reported by onne@onnlucky.com.

Multipart parts now have a name and filename property. Those are the
same as:

part.headers['content-disposition'].name
part.headers['content-disposition'].filename

This patch also updates and improves the docs for the multipart module.

No longer based on Ragel, but hand-written.

Had to add HTTPConnection.resetParser() because the parser is stricter and
will error out when you try to give it a message after the previous had
"Connection: close". The HTTP client was doing that. Thus we reset the
parser manually after each new connection.

This reverts commit f623fd76.
But only the changes made in lib/ they were falsely detecting outgoing
headers.

(With just one change: remove -Werror)