[dovecot/core] adb9f4: lib-fs: Added fs_write_stream_abort_async()

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/dovecot/core
  Commit: adb9f4a606df2df9fdd6502cfffa6fc5de92843f
      https://github.com/dovecot/core/commit/adb9f4a606df2df9fdd6502cfffa6fc5de92843f
  Author: Timo Sirainen <timo.sirainen at dovecot.fi>
  Date:   2016-06-01 (Wed, 01 Jun 2016)

  Changed paths:
    M src/lib-fs/fs-api.c
    M src/lib-fs/fs-api.h

  Log Message:
  -----------
  lib-fs: Added fs_write_stream_abort_async()