Encoder revamp#202

Merged

graebm merged 22 commits intomasterfrom

Mar 20, 2020

Commits on Mar 9, 2020

revamp encoder API (wip)
graebm
committed

Commits on Mar 10, 2020

hpack pre-encode cmd.
graebm
committed

Commits on Mar 11, 2020

Commits on Mar 13, 2020

Revamp HEADERS/PUSH_PROMISE/DATA frames
graebm
committed

Commits on Mar 16, 2020

all tests passing again
graebm
committed

Commits on Mar 17, 2020

Commits on Mar 20, 2020