Port of fixes originally made to the NetKit telnet client.

Previous behavior:
  Well-defined or exported variables are sent to the server on initial connect.
  The "environ list" command prints "*" before these variable names.
  Other variables are sent to the server if it requests them.
  The "environ list" command prints " " before these variable names.
New behavior:
  Well-defined variables are sent to the server on initial connect.
  The "environ list" command prints "*" before these variable names.
  Exported variables are sent to the server on initial connect.
  The "environ list" command prints "+" before these variable names.
  Other variables are NOT sent to the server.
  The "environ list" command prints " " before these variable names.

diff -uNr krb5-1.4.1/src/appl/telnet/telnet/authenc.c krb5-1.4.1/src/appl/telnet/telnet/authenc.c
--- krb5-1.4.1/src/appl/telnet/telnet/authenc.c	2002-11-15 15:21:34.000000000 -0500
+++ krb5-1.4.1/src/appl/telnet/telnet/authenc.c	2005-06-29 21:06:39.000000000 -0400
@@ -83,13 +83,6 @@
 }
 
 	char *
-telnet_getenv(val)
-	char *val;
-{
-	return((char *)env_getvalue((unsigned char *)val));
-}
-
-	char *
 telnet_gets(tprompt, result, length, echo)
 	char *tprompt;
 	char *result;
diff -uNr krb5-1.4.1/src/appl/telnet/telnet/commands.c krb5-1.4.1/src/appl/telnet/telnet/commands.c
--- krb5-1.4.1/src/appl/telnet/telnet/commands.c	2005-04-07 17:17:26.000000000 -0400
+++ krb5-1.4.1/src/appl/telnet/telnet/commands.c	2005-06-29 21:11:34.000000000 -0400
@@ -1889,8 +1889,9 @@
 	register struct env_lst *ep;
 
 	for (ep = envlisthead.next; ep; ep = ep->next) {
-		printf("%c %-20s %s\r\n", ep->export ? '*' : ' ',
-					ep->var, ep->value);
+		printf("%c %-20s %s\r\n",
+		       " +*"[(ep->welldefined ? 2 : (ep->export > 0))],
+		       ep->var, ep->value);
 	}
 }
 
@@ -1914,13 +1915,15 @@
 }
 
 	unsigned char *
-env_getvalue(var)
+env_getvalue(var, export_only)
 	unsigned char *var;
+	int export_only;
 {
 	register struct env_lst *ep;
 
 	if ((ep = env_find(var)))
-		return(ep->value);
+		if (ep->export || !export_only)
+			return(ep->value);
 	return(NULL);
 }
 
diff -uNr krb5-1.4.1/src/appl/telnet/telnet/externs.h krb5-1.4.1/src/appl/telnet/telnet/externs.h
--- krb5-1.4.1/src/appl/telnet/telnet/externs.h	2003-04-23 23:27:56.000000000 -0400
+++ krb5-1.4.1/src/appl/telnet/telnet/externs.h	2005-06-29 21:05:16.000000000 -0400
@@ -347,7 +347,7 @@
 
 extern unsigned char
     *env_default (int, int),
-    *env_getvalue (unsigned char *);
+    *env_getvalue (unsigned char *, int);
 
 extern int
     env_is_exported (unsigned char *);
diff -uNr krb5-1.4.1/src/appl/telnet/telnet/telnet.c krb5-1.4.1/src/appl/telnet/telnet/telnet.c
--- krb5-1.4.1/src/appl/telnet/telnet/telnet.c	2005-06-29 21:13:29.000000000 -0400
+++ krb5-1.4.1/src/appl/telnet/telnet/telnet.c	2005-06-29 21:09:13.000000000 -0400
@@ -552,7 +552,7 @@
 #endif
 
 	    case TELOPT_XDISPLOC:	/* X Display location */
-		if (env_getvalue((unsigned char *)"DISPLAY") &&
+		if (env_getvalue((unsigned char *)"DISPLAY", 0) &&
 		    env_is_exported((unsigned char *)"DISPLAY"))
 		    new_state_ok = 1;
 		break;
@@ -813,7 +813,7 @@
 		resettermname = 0;
 		if (tnamep && tnamep != unknown)
 			free(tnamep);
-		if ((tname = (char *)env_getvalue((unsigned char *)"TERM")) &&
+		if ((tname = (char *)env_getvalue((unsigned char *)"TERM", 0)) &&
 				(setupterm(tname, 1, &err) == 0)) {
 			tnamep = mklist(termbuf, tname);
 		} else {
@@ -988,7 +988,7 @@
 	    unsigned char temp[50], *dp;
 	    int len;
 
-	    if (((dp = env_getvalue((unsigned char *)"DISPLAY")) == NULL) ||
+	    if (((dp = env_getvalue((unsigned char *)"DISPLAY", 0)) == NULL) ||
 		(! env_is_exported((unsigned char *)"DISPLAY"))) {
 		/*
 		 * Something happened, we no longer have a DISPLAY
@@ -1669,7 +1669,7 @@
 			env_opt_add(ep);
 		return;
 	}
-	vp = env_getvalue(ep);
+	vp = env_getvalue(ep, 1);
 	elen = 2 * (vp ? strlen((char *)vp) : 0) +
 		2 * strlen((char *)ep) + 6;
 	if ((opt_replyend - opt_replyp) < elen)
@@ -2327,7 +2327,7 @@
 	send_will(TELOPT_LINEMODE, 1);
 	send_will(TELOPT_NEW_ENVIRON, 1);
 	send_do(TELOPT_STATUS, 1);
-	if (env_getvalue((unsigned char *)"DISPLAY") &&
+	if (env_getvalue((unsigned char *)"DISPLAY", 0) &&
 	    env_is_exported((unsigned char *)"DISPLAY"))
 	    send_will(TELOPT_XDISPLOC, 1);
 	if (eight)
--- krb5-1.4.1/src/appl/telnet/telnetd/authenc.c	2005-06-29 21:25:09.000000000 -0400
+++ krb5-1.4.1/src/appl/telnet/telnetd/authenc.c	2005-06-29 21:25:13.000000000 -0400
@@ -67,14 +67,6 @@
 }
 
 	char *
-telnet_getenv(val)
-	char *val;
-{
-	extern char *getenv();
-	return(getenv(val));
-}
-
-	char *
 telnet_gets(prompt, result, length, echo)
 	char *prompt;
 	char *result;
--- krb5-1.4.1/src/appl/telnet/telnet/telnet.1	2005-06-29 21:26:55.000000000 -0400
+++ krb5-1.4.1/src/appl/telnet/telnet/telnet.1	2005-06-29 21:29:05.000000000 -0400
@@ -401,7 +401,7 @@
 .I variable
 to have a value of
 .IR value .
-Any variables defined by this command are automatically exported.  The
+Variables defined by this command are not automatically exported.  The
 .I value
 may be enclosed in single or double quotes so that tabs and spaces may
 be included.
@@ -423,8 +423,8 @@
 .TP
 .B list
 List the current set of environment variables.  Those marked with a \&*
-will be sent automatically; other variables will only be sent if
-explicitly requested.
+will be sent automatically; those marked with a \&+ will be sent if the
+other end requests their values, and other variables will not be sent.
 .TP
 .B \&?
 Prints out help information for the