[#929] Implemented multi-homing opertions in SctpServerChannels and SCTP Javadocs cleanup
Fix a bug where freeInbound/OutboundBuffer() is not called when a handler is removed from a pipeline.
Fix a bug where the buffers are freed too early when a handler is removed or replaced
Fix a bug where ChannelPIpeline.remove/replace() fails when its channel is not registered yet
Chrome requires the :version: header in SPDY_SESSION_PUSHED_SYN_STREAM frames otherwise it issues a HTTP_TRANSACTION_SPDY_SEND_REQUEST_HEADERS and a SPDY_STREAM_ERROR saying "HEADERS incomplete headers, but pending data frames."

Ported from 3
SPDY: allow empty header values in SPDY/3

Ported from 3