test: replace util.inherits with es6 extends
I wanted to see how hard it would be to eradicate util.inherits() from an existing code base and I figured, having done the work, I might as well PR it.
I did a quick and partial attempt at updating lib/ as well but it makes for huge diffs, plus it breaks code that calls constructors as functions (e.g. server = http.Server(cb).)
$ git stash show
lib/_debug_agent.js | 237 ++++++++++++++++++------------------
lib/_debugger.js | 808 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++--------------------------------------------------------------
lib/_http_agent.js | 460 +++++++++++++++++++++++++++++++++++----------------------------------
lib/_http_client.js | 590 ++++++++++++++++++++++++++++++++++++++++++++---------------------------------------------
lib/_http_incoming.js | 275 +++++++++++++++++++++---------------------
lib/http.js | 85 ++++++-------
lib/https.js | 253 +++++++++++++++++++-------------------
test/parallel/test-http-keepalive-client.js | 4 +-
test/parallel/test-http-keepalive-maxsockets.js | 4 +-
test/parallel/test-http-keepalive-request.js | 4 +-
test/parallel/test-https-agent-servername.js | 2 +-
test/parallel/test-https-agent-sni.js | 2 +-
test/parallel/test-https-agent.js | 2 +-
13 files changed, 1347 insertions(+), 1379 deletions(-)