another tcp apps IPv6 updates.(should be make world safe)

ftp, telnet, ftpd, faithd
  also telnet related sync with crypto, secure, kerberosIV

Obtained from: KAME project

kerberos5/libexec/telnetd/Makefile

@@ -8,7 +8,7 @@ MAN8=		telnetd.8
 
 CFLAGS+=	-DLINEMODE -DUSE_TERMIO -DDIAGNOSTICS -DOLD_ENVIRON \
 		-DENV_HACK -DAUTHENTICATION -DENCRYPTION \
-		-I${TELNETDIR}
+		-I${TELNETDIR} -DINET6
 
 SRCS=		global.c slc.c state.c sys_term.c telnetd.c \
 		termstat.c utility.c authenc.c

kerberos5/usr.bin/telnet/Makefile

@@ -4,15 +4,15 @@ PROG=		telnet
 
 CFLAGS+=	-DKLUDGELINEMODE -DUSE_TERMIO -DENV_HACK -DSKEY \
 		-DENCRYPTION -DAUTHENTICATION -DKRB4 \
-		-I${TELNETDIR}
+		-I${TELNETDIR} -DIPSEC -DINET6
 
 SRCS=		authenc.c commands.c main.c network.c ring.c sys_bsd.c \
 		telnet.c terminal.c tn3270.c utilities.c
 
 DPADD=		${LIBTERMCAP} ${LIBTELNET} ${LIBDES} ${LIBKRB} ${LIBCRYPT} \
-		${LIBCOM_ERR}
+		${LIBCOM_ERR} ${LIBIPSEC}
 LDADD=		-ltermcap -L${TELNETOBJDIR} -ltelnet -ldes \
-		-L${KRBOBJDIR} -lkrb -lcrypt -lcom_err -lmp
+		-L${KRBOBJDIR} -lkrb -lcrypt -lcom_err -lmp -lipsec
 
 .include <bsd.prog.mk>