Michal Marek forwarded the bug report

https://bugzilla.novell.com/show_bug.cgi?id=332917 about a HTTP redirect to
FTP that caused memory havoc. His work together with my efforts created two
fixes:

#1 - FTP::file was moved to struct ftp_conn, because is has to be dealt with
     at connection cleanup, at which time the struct HandleData could be
     used by another connection.
     Also, the unused char *urlpath member is removed from struct FTP.

#2 - provide a Curl_reset_reqproto() function that frees
     data->reqdata.proto.* on connection setup if needed (that is if the
     SessionHandle was used by a different connection).

1 files changed, 5 insertions, 0 deletions

diff --git a/lib/url.h b/lib/url.h
index d7a75e0a5..e4f72eb7a 100644
--- a/lib/url.h
+++ b/lib/url.h
@@ -84,4 +84,9 @@ CURLcode Curl_doing_fdset(struct connectdata *conn,
                           int *max_fdp);
 #endif
 
+/* Called on connect, and if there's already a protocol-specific struct
+   allocated for a different connection, this frees it that it can be setup
+   properly later on. */
+void Curl_reset_reqproto(struct connectdata *conn);
+
 #endif