Update delegate to 6.1.16. Changes include:

Update delegate to 6.1.16.  Changes include:

 + FTP/TUNNEL: enabled PASV on TUNNEL (precedes XDC/TUNNEL)
 + FTP/TUNNEL: enabled MODE XDC on TUNNEL
 + FTP: enabled "CWD //ftp:foo%40%bar@server/path"
 + FTP: enabled USER user:pass@host, CWD //user:pass@host anytime
 * general: regard POLLHUP as well as POLLIN|POLLPRI (mainly for pipe)
   (it can be disabled by -wH command line option for debugging)
 + FTP: enabled %XX in password of "user:pass" part for USER,CWD
 + TUNNEL: fixed to wait children for TUNNEL via sshd (since 6.1.13)
 + FTP: fixed cached RETR by PASV with DeleGate in XDC mode
 + FTP/HTTP: fixed erasing password in embeded URL in FTP/HTTP page
 + HTTP: fixed relaying HTTP/0.9 response to HTTP/1.1 client
 + cache: fixed readlink() error detection on some platforms(AIX)
 + IMAP: introduced IMAP proxying by "LOGIN user@host pass"
 + SMTPGATE: don't count Max-Exclams(!) in uuencoded text
 + HTTP: fixed possible SEGV on Can't Connect message generation
 + MIME: fixed getting value out of "name=value; ..."
 + FTP: fixed REST followed by RETR //serv/path, with cache, etc.
 + SMTPGATE: return appropriate code(554) on bad Message-ID error
 + porting: trial to escape readlink() bug in some version of Linux
 + porting: fix for compilation on AIX+gcc