I noted a missing text for exit-code 89 in ../docs/curl.1:

--- Git-latest/docs/curl.1 2013-09-22 12:28:32 +0000
+++ docs/curl.1 2013-10-16 20:25:17 +0000
@@ -2055,6 +2055,8 @@
 unable to parse FTP file list
 .IP 88
 FTP chunk callback reported error
+.IP 89
+No connection available, the session will be queued
 .IP XX
 More error codes will appear here in future releases. The existing ones
 are meant to never change.

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