Now returns a 417 error status or allows for an event listener on
the `checkExpectation` event. Before we were ignoring requests that
had misspelled `100-continue` values for expect headers.

This is a quick port of the work done here:
nodejs/node-v0.x-archive#7132 by alFReD-NSH
with surrounding discussion here:
nodejs/node-v0.x-archive#4651

Also updates all the instances of the deprecated
EventEmitter.listenerCount to the current self.listenerCount. Most
of these were in the new code ported over but there was another
legacy instance.

Refs: #2403
PR-URL: #4501
Reviewed-By: James M Snell <jasnell@gmail.com>

Notable changes:

* events: make sure console functions exist (Dave) #4479
* fs: add autoClose option to fs.createWriteStream (Saquib) #3679
* http: improves expect header handling (Daniel Sellers) #4501
* node: allow preload modules with -i (Evan Lucas) #4696
* v8,src: expose statistics about heap spaces (`v8.getHeapSpaceStatistics()`) (Ben Ripkens) #4463
* Minor performance improvements:
  - lib: Use arrow functions instead of bind where possible (Minwoo Jung) #3622
  - module: cache stat() results more aggressively (Ben Noordhuis) #4575
  - querystring: improve parse() performance (Brian White) #4675

PR-URL: #4742

Notable changes:

* events: make sure console functions exist (Dave) #4479
* fs: add autoClose option to fs.createWriteStream (Saquib) #3679
* http: improves expect header handling (Daniel Sellers) #4501
* node: allow preload modules with -i (Evan Lucas) #4696
* v8,src: expose statistics about heap spaces (`v8.getHeapSpaceStatistics()`) (Ben Ripkens) #4463
* Minor performance improvements:
  - lib: Use arrow functions instead of bind where possible (Minwoo Jung) #3622
  - module: cache stat() results more aggressively (Ben Noordhuis) #4575
  - querystring: improve parse() performance (Brian White) #4675

PR-URL: #4742

Now returns a 417 error status or allows for an event listener on
the `checkExpectation` event. Before we were ignoring requests that
had misspelled `100-continue` values for expect headers.

This is a quick port of the work done here:
nodejs/node-v0.x-archive#7132 by alFReD-NSH
with surrounding discussion here:
nodejs/node-v0.x-archive#4651

Also updates all the instances of the deprecated
EventEmitter.listenerCount to the current self.listenerCount. Most
of these were in the new code ported over but there was another
legacy instance.

Refs: nodejs#2403
PR-URL: nodejs#4501
Reviewed-By: James M Snell <jasnell@gmail.com>

Notable changes:

* events: make sure console functions exist (Dave) nodejs#4479
* fs: add autoClose option to fs.createWriteStream (Saquib) nodejs#3679
* http: improves expect header handling (Daniel Sellers) nodejs#4501
* node: allow preload modules with -i (Evan Lucas) nodejs#4696
* v8,src: expose statistics about heap spaces (`v8.getHeapSpaceStatistics()`) (Ben Ripkens) nodejs#4463
* Minor performance improvements:
  - lib: Use arrow functions instead of bind where possible (Minwoo Jung) nodejs#3622
  - module: cache stat() results more aggressively (Ben Noordhuis) nodejs#4575
  - querystring: improve parse() performance (Brian White) nodejs#4675

PR-URL: nodejs#4742

…t "Expect" header usage

Many MPU tests were setting "Expect: application/json", a presumed
accidental misspelling of the "Accept" header. The only valid value
for the "Expect" header is "100-continue". Old muskie was using
node 0.10. Sometime after 0.10 nodejs/node#4501
changed node behaviour to respond with 417 Expectation Failed if given
a bogus "Expect" header.