clear out the hash table after resizing, and check for table modification in reads
fix containsValue to take snapshot of `table` and use Arrays.fill for clearing out oldTable
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."
SPDY: allow empty header values in SPDY/3
SPDY: fix regression in SpdyFrameDecoder.decodeHeaderBlock()
SPDY: fix improper use of SYNC_FLUSH in SpdyHeaderBlockZlibCompressor