[libsoup] (8 commits) ...http2: retry messages that failed due to IO errors

[Carlos Garcia Campos <carlosgc src gnome org>]

Summary of changes:

  3c36571... server: fix crash when HTTP/2 connection is closed early (*)
  9091c2c... http2: check error/progress before session want read/write (*)
  fe1e624... http2: handle connection terminated unexpectedly error when (*)
  d7e2dc8... http2: finish the async close task in case of IO error (*)
  be1a704... http2: set the IO error for sync requests too (*)
  1b60814... http2: mark IO as shutting down before processing async pen (*)
  bba8c0f... server: make sure we don't call nghttp2 IO functions from c (*)
  fb7cad1... http2: retry messages that failed due to IO errors (*)

(*) This commit already existed in another branch; no separate mail sent