White-space changes only, exception being the rare insertion of NL before
closing brace (couldn't find the option to disable that behavior).

I excluded some header files (e.g. sbbs.h) since uncrustify seemed to be doing
more harm than good there. I might just end up applying different set of rules
to .h files.

This is to be used (e.g. instead of NODE_BXFR) for sysop-custom node actions.

For SFTP sessions, there's no shell/terminal, so no need to run command
shells (with their input timeouts, etc.). Reflect the node connection as
"via sftp" in the node status. Handle node interruption signal. Probably more
to do here with node status/actions (e.g. it'd be nice to set the action to
"uploading or "downloading" when appropriate).

<nelgin> Remind me why you can't show the ip address on node status? :)

Using the new '-v[key]' option, a sysop can view one, some, or all of the
key/value pairs from the nodes with a connected client. For nodes without
a connected client, the client.ini file values aren't particularly useful, but
if someone wants an option to show those values for non-client-connected nodes
I can do that too.

When using '-v', all the client.ini key/value pairs will be displayed for all
the node records requested with currently connected clients. By specifying
'-v[key]' the sysop can specify a key to display (rather than all of them)
e.g. 'node list -vaddr' to list nodes with remote client IP addresses.
This option can be used multiple times on the command-line to view multiple
keys. See node*/client.ini for the list of supported keys.

This feature only works for nodes whose directory paths are ../node#/
relative to the ctrl directory. Since the node utility doesn't read any
configuration files, this is a limitation. If you have different node
directory names/parents and need to use this feature, let me know and I'll
see about adding support for reading/parsing main.ini file to discover those
non-standard/default node directory paths automatically.

The version number displayed is now taken from the sbbs version (sbbsdefs.h).
The maximum ctrl directory path is now extended from 40 chars to MAX_PATH.
More readable help/usage output (using indentation).

This won't impact Synchronet as it has a separate signal handling
thread, but we still need to behave properly for processes that
don't.  I'm also saying that ENOMEM does not indicate a disconnection,
though it may be better to pretend it was disconnected...

When a sysop wants to chat, he wants to chat right now, damnit!

automatically revert to Raw/TCP mode. This resolves the issue of users that
connect using modem/serial emulators over TCP that do not actually support Telnet and then either try to transfer files, which usually will not work due to escaped (or unescaped) IAC (0xFF) characters, or the user may be sent Telnet Go Ahead (GA) sequences which may display as periodic garbage in their terminal program.

This seemed like a better solution than having (yet another) dedicated terminal server port for "raw" connections over TCP, though a "raw" port still might not be a bad idea for a future enhancement. RLogin is already super close to "raw", so it's probably not really necessary to have another port configured/listening.

after a user (has been) disconnected and before the node transitions to waiting
for connection (WFC) status. Usually the duration of this status is very short,
but it can be longer (e.g. for running log-out module and event) and for (new)
msg-scan pointer fix-ups.
Updated logout() to remove some cruft and add some more log/debug output.
Automatic new-scan pointer fix-ups when performing new-message scans (if the
current pointer is greater than the last message number, set it to the last
message number) and when saving message pointers.
Passing user_t* to get/putmsgptrs() instead of message number now (to better
detect Guest account).

node messages and timeleft warnings.

Requested by xvlxxix for a JS game.

RLogin and SSH.

Reverted back to macro bethod of testing sizeof(node_t). Some compilers (e.g. MSVC) resolve sizeof() after preprocessing.