blog: Post for v0.11.5
src: remove redundant symbol init in node_file.cc

Don't lazy-init the oncomplete symbol string in the After() function,
it has already been created at module init time.
http: speed up callbacks, use array indices

Use array indices rather than named properties to store callbacks on
the HTTPParser object.  Speeds up the http benchmarks by a few percent.
tls: handle errors on socket before releasing it

Fix sudden uncatchable ECONNRESETs, when using https server.
zlib: replace C cast with static_cast

Seems to have escaped the Eye of Sauron^WFedor in commit 8e29ce9.
tools: cpplint: fix NOLINT(build/include_order)

And build/include, build/include_alpha and readability/streams
probably too, though those are currently unused and therefore untested.
smalloc: don't do Has(key), then Get(key)

Don't check for the key first before retrieving it. Just fetch it and
check that it has the type we expect.
src: add MakeCallback() that takes an array index

Internal helper function for dispatching by array index rather than
named property.
timers: dispatch ontimeout callback by array index

Achieve a minor speed-up by looking up the timeout callback on the timer
object by using an array index rather than a named property.

Gives a performance boost of about 1% on the misc/timers benchmarks.
node: remove duplicate infoBox checks

These checks are now done in C++ and don't need to also be checked in
JS. Also remove a couple unused variables.
test: update tests after internal api change

Commit 0aa1335 changes the way timeout events are dispatched. Update
two tests that still used the old way.
http: add agent.maxFreeSockets option
doc: http keepalive, agent options

Close #5839
http: provide access to raw headers/trailers

The format is [key,value,key,value,...] because that seems to have the
lowest overhead.

Close #4844
doc: http rawHeaders/rawTrailers
http: Handle hex/base64 encodings properly

This is a backport of 6d3d60aced39d59eaa5e705b7d822c227d0d3dae for
v0.10.
http: Write hex/base64 chunks properly

This removes a dubious performance "optimization" where strings body
chunks were concatenated to one another (and to the headers) without any
regard for their encoding.
http: Add write()/end() callbacks
http: make OutgoingMessage._flush inline-able
http: Consistent 'finish' event semantics

In other Writable streams, the 'finish' event means that all of the data
was written, and flushed to the underlying system.

The 'prefinish' event means that end() was called, and all of the data
was processed, but not necessarily completely flushed.

This change brings the http OutgoingMessage classes more in sync with
the other Writable classes throughout Node.

Unfortunately, this change highlights an issue with http
IncomingMessages, where the _dump() method will not actually pull the
data off the wire.  This is a minor issue that is typically only
relevant in test cases, and will be addressed in the next commit.