hpack huffman encoding can be made mostly copy-less (suggested by @kazu-yamamoto)
hpack huffman encoding can be made mostly copy-less (suggested by @kazu-yamamoto)

Conflicts:
	lib/http2/hpack.c

mingodad/h2o,mingodad/h2o,mingodad/h2o,mingodad/h2o,mingodad/h2o,mingodad/h2o,mingodad/h2o,mingodad/h2o