Added support for adding credits/minutes to uploader of file when it is
subsequently downloaded and notifies uploader when files are downloaded.

megabytes, etc) by specifying an optional "unit" parameter.

if it can't bind ctrl_port-1, then it'll retry the bind using any port (0).

module (.js or .bin) files.

problem with multiple sessions on *BSD.

or longer, uses a passed 'buflen' parameter to determine the truncation point.

and in the SITE WHO command.
Up-time root value is reset if the FTP server thread is shutdown & restarted.

Added SITE VER and SITE UPTIME commands.
Added SITE RECYCLE and SITE RECYCLE ALL sysop-only commands.

Hopefully *BSD prototypes agree. :-(

variants (gmtime_r, localtime_r, and ctime_r) for thread-safe operation on Unix

file are silently refused (same format as other text/*.can files).

to download a file, it attempts to CWD to the path, and if the CWD succeeds
the subsequent requested paths are all wrong. This fixes that problem.

the actual read/write permissions (FTP clients should ignore them anyway).

Increased the select timeout in sockprintf() from 1 to 5 minutes.
Changed the server cycle frequency from 5 to 2 seconds (checks for recycling
semaphores).

operation).

(for Linux setuid fix in sbbscon.c).
Removed unnecessary seteuid calls around PASV port binding.