MINOR: stream-int: Remove SI_FL_NOLINGER/NOHALF to rely on CS flags instead

Flags to disable lingering and half-close are now handled at the conn-stream
level. Thus SI_FL_NOLINGER and SI_FL_NOHALF stream-int flags are replaced by
CS_FL_NOLINGER and CS_FL_NOHALF conn-stream flags.
14 files changed