isaacs 987cbbc191 Handle cyclic links smarter in fs.realpath
Rather than aborting in the face of *any* repeated link in a given path,
instead only abort if such a cycle actually makes a given path unresolvable.

Test for this by doing a normal stat.  Still use the seenLinks object to
cache link contents so as to cut own a little bit on readlink calls.

Also add a pathological test that fails without the change to fs.js.
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Evented I/O for V8 javascript.

To build:

  ./configure
  make 
  make install

To run the tests:
  
  make test

To build the documentation:

  make doc
 
To read the documentation:

  man doc/node.1

See http://nodejs.org/ for more information. For help and discussion
subscribe to the mailing list by visiting
http://groups.google.com/group/nodejs or by sending an email to
nodejs+subscribe@googlegroups.com.
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Readme 175 MiB