Log Message:
www/nghttp2: Update to 1.32.0.

- lib: Ignore all input after calling session_terminate_session
- lib: Fix treatment of padding
- lib: Don't allow 101 HTTP status code because HTTP/2 removes
  HTTP Upgrade
- build: add ENABLE_STATIC_LIB option to build static lib
- third-party: Upgrade neverbleed to the latest master
- asio: Support client side SNI
- src: Compile with libressl 2.7.2
- src: Allow building without NPN
- h2load: -r and --duration are mutually exclusive