Document IPv6 changes. Contributed by itojun.
diff --git a/Doc/lib/libftplib.tex b/Doc/lib/libftplib.tex
index f6da28c..e7e5341 100644
--- a/Doc/lib/libftplib.tex
+++ b/Doc/lib/libftplib.tex
@@ -191,9 +191,9 @@
\begin{methoddesc}{transfercmd}{cmd\optional{, rest}}
Initiate a transfer over the data connection. If the transfer is
-active, send a \samp{PORT} command and the transfer command specified
+active, send a \samp{EPRT} or \samp{PORT} command and the transfer command specified
by \var{cmd}, and accept the connection. If the server is passive,
-send a \samp{PASV} command, connect to it, and start the transfer
+send a \samp{EPSV} or \samp{PASV} command, connect to it, and start the transfer
command. Either way, return the socket for the connection.
If optional \var{rest} is given, a \samp{REST} command is