unifdef compatibility for old BSD servers. This has been
disabled, so no binary change. from openbsd.

minor cleanup:
- more const
- prevent overflow of the argument vector
- change a lot of unsigned to signed to eliminate casts

ExitString is used for error exit, do the minimum necessary here.
Avoid infinite loop:
telrcv->suboption->ExitString->SetForExit->telrcv

Reported by hacker fantastic, thanks!

static-ify.

unifdef TN3270 which is never defined (and wouldn't build if it was)
delete tn3270 file no longer needed.
SetIn3270(); expands to nothing now, so remove it.

No functional change.

switch sprintf to snprintf in places.

Reported by hacker fantastic, thanks!

ok xtos.

branches: 1.23.18; 1.23.20; 1.23.28; 1.23.32; 1.23.38;
PR/45805: Borodin Oleg: telnet/telnetd with -DAUTHENTICATION -DENCRYPTION
(rfc2941)
- Minimal diffs to separate MKCRYPTO from USE_KERBEROS

branches: 1.22.40;
PR/18906: roskens at elfin dot net: misc. select() to poll() updates.

Adapted to -current by myself, thanks for the patch!

Change first arg of printsub() for 'char' to 'int' so that it builds again.
This matches the binary interface from before if was de-__Peed (or at least
that of K&R C).
In any case having arguments (and return values) of char and short isn't
especially sensible.

Fix build errors caused by de-__P()--ing "libtelnet".

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22365, verified by myself.

more unifdef

remove unneeded #ifdef. (confirmed that same *.o is generated)

use bounded copy ops

Ansify.

null commit

poll.h, not sys/poll.h

Duh, generate the pollfd arrays outside of loops, not that it really matters.

select() -> poll()

De-register, de-__P. Remove #ifndef __STDC__ parts.
defines.h: Be more careful with braces in macro definitions.

Fix unused variable warning in the non-ENCRYPTION case (e.g. when
built at tn3270(1)).

Bring the telnet situation back into better shape. Specifically,
pull in just about all of the differences from the crypto-us telnet
suite (which includes Kerberos 4 and connection encryption support).
Also bring in the Kerberos 5 support from the Heimdal telnet, and
frob a little so that it can work with the non-Heimdal telnet suite.

There is still some work left to do, specifically:
- Add Heimdal's ticket forwarding support to the Berkeley Kerberos 4
module.
- Add connection encryption support to the Heimdal Kerberos 5
module. Hints on this can be taken from the MIT Kerberos 5
module which still exists in crypto-us.

However, even with the shortcomings listed above, this is a
better situation than using the stock Heimdal telnet suite,
which does not understand the IPSec policy stuff, and is also
based on much older code which contains bugs that we have already
fixed in the NetBSD sources.

branches: 1.7.10;
Adjust for tn3270 cleanup.

WARNSify and fix problems passing int * -> long *

RCS id cosmetics.

update to 95.10.23 version of telnet
also, RCS ID police

new telnet from ftp.cray.com. Encryption support ripped out, pending
figuring out what to do about it...

Add RCS identifiers.

branches: 1.1.1;
Initial revision