Fixed ws_connbuf_init() protoyp
Fixed ws_connbuf_deinit() prototyp
Fixed ws_connbuf_reserve() prototype
Added comments to the params of ws_connbuf_init()
Added missing include
Updated struct ws_connbuf:

Inserted a member called `blocked`, which should block the a discard
action if memory is reserved, but not yet written
Fixed return value description of ws_connbuf_init()
Updated ws_connbuf_reserve()'s description
Updated ws_connbuf_append()'s description
Updated ws_connbuf_release()'s description