zlogin is an Amiga BBS *door* that lets your BBS users play door
games hosted on a remote Synchronet door-game server. It connects
outbound to the server using the rlogin protocol, tells the server
which game to launch, then acts as a transparent 8-bit byte bridge
between the local user's terminal and the remote game until the
door exits.

It works with Zeus, C-Net and Excelsior BBS software (and a plain
Amiga shell for testing), and is written in AmiBlitz 3.

When a user picks the door, zlogin:

1. Opens an rlogin (TCP) connection to the configured Synchronet server.
2. Sends the user's handle plus, for an auto-launch door, the terminal-type
   `xtrn=<doorcode>`. (Leave the doorcode out and it sends no `xtrn=` request,
   so the server presents its own door menu instead.)
3. Synchronet auto-launches that door game and drops the user straight in -
   or, with no doorcode, shows its menu for the user to pick from.
4. Pipes raw bytes both ways until the game exits, then returns to your BBS.

There is no local echo, no line buffering and no ANSI processing on the
Amiga side - the remote door owns the screen, exactly like a real terminal.

 PERMSSN    UID  GID    PACKED    SIZE  RATIO METHOD CRC     STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
-rw-rw-r--  1000/1000     7969   18340  43.5% -lh5- b022 Jun 28 02:49 DEVLOG.md
-rw-rw-r--  1000/1000     3123    7176  43.5% -lh5- 52ef Jun 28 02:55 README.md
-rw-rw-r--  1000/1000      262     414  63.3% -lh5- c31a Jun 28 02:54 file_id.diz
-rwxrw----  1000/1000    16920   39428  42.9% -lh5- 04cc Jun 28 02:50 zlogin
-rwxr-----  1000/1000     1156    2597  44.5% -lh5- 4100 Jun 20 03:01 zlogin.cfg
-rw-rw-r--  1000/1000     1180    2679  44.0% -lh5- c07a Jun 20 01:44 zlogin.cfg-bucko
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total         6 files   30610   70634  43.3%            Jun 29 01:31