FT_BBS is beeing developed on FreeBSD and compiles on NeXTStep 3.2,
HPUX-9 and Linux, but there is no real testing on the latter.

A port to a system 'mysystem' consists of two files located in 'conf':
'Mysystem.sys' and 'mysystem.h'.
The first line in 'Mysystem.sys' should be
#<Mysystem> IDENT <identcommand>
<identcommand> have to return a nonempty string if it run on its
according system, on another system it have to return an empty string.
The rest of the file can be similar to the other *.sys files.

If 'Configure' says 'Determining System', it tries all *.sys-files by
its first line. All matching will be listed together with the pseudo-system
'none'. If you pick one but 'none', 'Makefile', 'local.h' ... will be
adapted for the selected configuration.
If you answer 'none' for system in 'Configure', it tries to configure
automatically.

In each <system>.sys-file is a line 'SYSHEADER=<system>.h, this <system>.h
will be included by each sourcefile and is intended for additional defines
and declarations.
