4.16.0

• Add "json escape" setting for res.json and res.jsonp
• Add express.json and express.urlencoded to parse bodies
• Add options argument to res.download
• Improve error message when autoloading invalid view engine
• Improve error messages when non-function provided as middleware
• Skip Buffer encoding when not generating ETag for small response
• Use safe-buffer for improved Buffer API
• deps: accepts@~1.3.4
  • deps: mime-types@~2.1.16
• deps: content-type@~1.0.4
  • perf: remove argument reassignment
  • perf: skip parameter parsing when no parameters
• deps: etag@~1.8.1
  • perf: replace regular expression with substring
• deps: [email protected]
  • Use res.headersSent when available
• deps: parseurl@~1.3.2
  • perf: reduce overhead for full URLs
  • perf: unroll the "fast-path" RegExp
• deps: proxy-addr@~2.0.2
  • Fix trimming leading / trailing OWS in X-Forwarded-For
  • deps: forwarded@~0.1.2
  • deps: [email protected]
  • perf: reduce overhead when no X-Forwarded-For header
• deps: [email protected]
  • Fix parsing & compacting very deep objects
• deps: [email protected]
  • Add 70 new types for file extensions
  • Add immutable option
  • Fix missing </html> in default error & redirects
  • Set charset as "UTF-8" for .js and .json
  • Use instance methods on steam to check for listeners
  • deps: [email protected]
  • perf: improve path validation speed
• deps: [email protected]
  • Add 70 new types for file extensions
  • Add immutable option
  • Set charset as "UTF-8" for .js and .json
  • deps: [email protected]
• deps: [email protected]
• deps: [email protected]
• deps: vary@~1.1.2
  • perf: improve header token parsing speed
• perf: re-use options object when generating ETags
• perf: remove dead .charset set in res.jsonp