Documented error codes 77-80, and fixed the one for 60.

docs/curl.1

@@ -1504,7 +1504,7 @@ Problem with the local certificate
 .IP 59
 Couldn't use specified SSL cipher
 .IP 60
-Problem with the CA cert (path? permission?)
+Peer certificate cannot be authenticated with known CA certificates
 .IP 61
 Unrecognized transfer encoding
 .IP 62
@@ -1537,6 +1537,14 @@ No such user (TFTP)
 Character conversion failed
 .IP 76
 Character conversion functions required
+.IP 77
+Problem with reading the SSL CA cert (path? access rights?)
+.IP 78
+The resource referenced in the URL does not exist
+.IP 79
+An unspecified error occurred during the SSH session
+.IP 80
+Failed to shut down the SSL connection
 .IP XX
 There will appear more error codes here in future releases. The existing ones
 are meant to never change.