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Andy Green 81c221ed35 CLIENT_CONNECTION_ERROR add strings 
This clears up a couple of issues with client connect.

 - if CLIENT_CONNECTION_ERROR is coming, which of the many
   ways the rejection may have happened is documented in the
   in argument.  It's still possible if it just got hung up on
   in will be NULL, but now it has MANY more canned strings
   describing the issue available at the callback

	"getaddrinfo (ipv6) failed"
	"unknown address family"
	"getaddrinfo (ipv4) failed"
	"set socket opts failed"
	"insert wsi failed"
	"lws_ssl_client_connect1 failed"
	"lws_ssl_client_connect2 failed"
	"Peer hung up"
	"read failed"
	"HS: URI missing"
	"HS: Redirect code but no Location"
	"HS: URI did not parse"
	"HS: Redirect failed"
	"HS: Server did not return 200"
	"HS: OOM"
	"HS: disallowed by client filter"
	"HS: disallowed at ESTABLISHED"
	"HS: ACCEPT missing"
	"HS: ws upgrade response not 101"
	"HS: UPGRADE missing"
	"HS: Upgrade to something other than websocket"
	"HS: CONNECTION missing"
	"HS: UPGRADE malformed"
	"HS: PROTOCOL malformed"
	"HS: Cannot match protocol"
	"HS: EXT: list too big"
	"HS: EXT: failed setting defaults"
	"HS: EXT: failed parsing defaults"
	"HS: EXT: failed parsing options"
	"HS: EXT: Rejects server options"
	"HS: EXT: unknown ext"
	"HS: Accept hash wrong"
	"HS: Rejected by filter cb"
	"HS: OOM"
	"HS: SO_SNDBUF failed"
	"HS: Rejected at CLIENT_ESTABLISHED"

 - until now the user code did not get the new wsi that was created
    in the client connection action until it returned.  However the
    client connection action may provoke callbacks like
    CLIENT_CONNECTION_ERROR before then, if multiple client connections
    are initiated it makes it unknown to user code which one the callback
    applies to.  The wsi is provided in the callback but it has not yet
    returned from the client connect api to give that wsi to the user code.

    To solve that there is a new member added to client connect info struct,
    pwsi, which lets you pass a pointer to a struct wsi * in the user code
    that will get filled in with the new wsi.  That happens before any
    callbacks could be provoked, and it is updated to NULL if the connect
    action fails before returning from the client connect api.
2016-07-14 08:57:27 +08:00
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