No functional changes, but:

o unifdef AUTHENTICATE. We have never compiled this code, and its
  doubtful it will even work in this case.

o Style changes (some ansification, some comment updating)

o Diff reduction and code style merging with crypto telnet.

lib/libtelnet/Makefile

@@ -1,18 +1,18 @@
 #	From: @(#)Makefile	8.2 (Berkeley) 12/15/93
 # $FreeBSD$
 
-LIB=	telnet
+LIB=		telnet
 
-INTERNALLIB=yes
+INTERNALLIB=	yes
 INTERNALSTATICLIB=yes
-NOPIC=	yes
+NOPIC=		yes
 
-SRCS=	genget.c getent.c misc.c
-CFLAGS+= -DHAS_CGETENT
+SRCS=		genget.c getent.c misc.c
+CFLAGS+= 	-DHAS_CGETENT
 
 #
 # Remove obsolete shared libraries, if any.  We don't bother moving them
-# to/usr/lib/compat, since they were only used by telnet, telnetd and
+# to /usr/lib/compat, since they were only used by telnet, telnetd and
 # tn3270.
 #
 beforeinstall:

lib/libtelnet/genget.c

@@ -32,7 +32,12 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)genget.c	8.1 (Berkeley) 6/4/93";
+#if 0
+static const char sccsid[] = "@(#)genget.c	8.2 (Berkeley) 5/30/95";
+#else
+static const char rcsid[] =
+ "$FreeBSD$";
+#endif
 #endif /* not lint */
 
 
@@ -45,37 +50,33 @@ static char sccsid[] = "@(#)genget.c	8.1 (Berkeley) 6/4/93";
  * the length is returned.  If *s1 is a prefix of *s2,
  * the length of *s1 is returned.
  */
-	int
-isprefix(s1, s2)
-	register char *s1, *s2;
+int
+isprefix(char *s1, char *s2)
 {
-        char *os1;
-	register char c1, c2;
+	char *os1;
+	char c1, c2;
 
-        if (*s1 == '\0')
-                return(-1);
-        os1 = s1;
+	if (*s1 == '\0')
+		return(-1);
+	os1 = s1;
 	c1 = *s1;
 	c2 = *s2;
-        while (LOWER(c1) == LOWER(c2)) {
+	while (LOWER(c1) == LOWER(c2)) {
 		if (c1 == '\0')
 			break;
-                c1 = *++s1;
-                c2 = *++s2;
-        }
-        return(*s1 ? 0 : (*s2 ? (s1 - os1) : (os1 - s1)));
+		c1 = *++s1;
+		c2 = *++s2;
+	}
+	return(*s1 ? 0 : (*s2 ? (s1 - os1) : (os1 - s1)));
 }
 
 static char *ambiguous;		/* special return value for command routines */
 
-	char **
-genget(name, table, stlen)
-	char	*name;		/* name to match */
-	char	**table;	/* name entry in table */
-	int	stlen;
+char **
+genget(char *name, char **table, int stlen)
 {
-	register char **c, **found;
-	register int n;
+	char **c, **found;
+	int n;
 
 	if (name == 0)
 	    return 0;
@@ -96,9 +97,8 @@ genget(name, table, stlen)
 /*
  * Function call version of Ambiguous()
  */
-	int
-Ambiguous(s)
-	char *s;
+int
+Ambiguous(char *s)
 {
 	return((char **)s == &ambiguous);
 }

lib/libtelnet/getent.c

@@ -32,17 +32,23 @@
  */
 
 #ifndef lint
+#if 0
 static char sccsid[] = "@(#)getent.c	8.2 (Berkeley) 12/15/93";
+#else
+static const char rcsid[] =
+ "$FreeBSD$";
+#endif
 #endif /* not lint */
 
+#ifdef	HAS_CGETENT
 #include <stdlib.h>
+#endif
 
 static char *area;
 
 /*ARGSUSED*/
 int
-getent(cp, name)
-char *cp, *name;
+getent(char *cp, char *name)
 {
 #ifdef	HAS_CGETENT
 	char *dba[2];
@@ -58,8 +64,7 @@ char *cp, *name;
 #ifndef	SOLARIS
 /*ARGSUSED*/
 char *
-Getstr(id, cpp)
-char *id, **cpp;
+Getstr(char *id, char **cpp)
 {
 # ifdef	HAS_CGETENT
 	char *answer;

lib/libtelnet/misc-proto.h

@@ -31,6 +31,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)misc-proto.h	8.1 (Berkeley) 6/4/93
+ * $FreeBSD$
  */
 
 /*
@@ -76,4 +77,5 @@ void net_encrypt P((void));
 int telnet_spin P((void));
 char *telnet_getenv P((char *));
 char *telnet_gets P((char *, char *, int, int));
+void printsub P((int, unsigned char *, int));
 #endif

lib/libtelnet/misc.c

@@ -32,7 +32,12 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)misc.c	8.1 (Berkeley) 6/4/93";
+#if 0
+static const char sccsid[] = "@(#)misc.c	8.1 (Berkeley) 6/4/93";
+#else
+static const char rcsid[] =
+ "$FreeBSD$";
+#endif
 #endif /* not lint */
 
 #include <stdio.h>
@@ -53,9 +58,6 @@ auth_encrypt_init(local, remote, name, server)
 {
 	RemoteHostName = remote;
 	LocalHostName = local;
-#if	defined(AUTHENTICATION)
-	auth_init(name, server);
-#endif
 	if (UserNameRequested) {
 		free(UserNameRequested);
 		UserNameRequested = 0;