ef8129 Fix compatibility with modern SFTP clients like FileZilla

Authored and Committed by pghmcfc a month ago
    Fix compatibility with modern SFTP clients like FileZilla
    
    mod_sftp: When handling the 'keyboard-interactive' authentication mechanism,
    as used for (e.g.) PAM, make sure to properly handle DEBUG, IGNORE,
    DISCONNECT, and UNIMPLEMENTED messages, per RFC 4253.
    
    http://bugs.proftpd.org/show_bug.cgi?id=4385
    
        
file modified
+11 -0