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.

Still using BOOL where we need Win32 API compatibility.
Using JSBool instead of BOOL or bool where it matters.
Changed most relevant TRUE/FALSE to true/false too (though it's not as critical).

You shouldn't need to #include <stdbool.h> anywhere now - gen_defs.h should do that automatically/correctly based on the language/version/tool. In C23, stdbool.h isn't even needed for bool/true/false definitions (they're keywords), so we don't bother including stdbool.h in that case.
Microsoft didn't define __STDC_VERSION__ in their older tool chains (even though they were C99 compatible and had stdbool.h), so we use a _MSC_VER check to know that there's a stdbool.h we should use in that case.

For other/old compilers (e.g. Borland C) we #define bool/true/false following the pattern of stdbool.h (doesn't use a typedef).

I didn't convert UIFC yet.

This addresses issue #698

I wanted a couple of features for filters (e.g. blocked IP addreses):
- expiration date, optionally (only block for a limited time)
- display details of reason for filter in log messages (at time of block)

I've been thinking for some time that these files should be converted to .ini,
but then it occurred to me that I could do a sort of hybrid where the metadata
was key/value pairs tab-delimited from the search-pattern (first text on the
line). This is backward comaptible, relatively easy to view/edit by hand, and
extensible (easy to add/remove metadata fields in the future). So they'll
remain as text/*.can files.

The maximum line length for findstr/trashcan parsed files extended from 255 to
1000 characters.

Moved all trashcan-related functions from scfglib1.c to (new file) trash.c.

For the first time, I actually tested a build on WSL *before* committing to
Git. So, this *should* pass CI the first time. :-O

Many searches are done (e.g. in the mail server, QWK import) for either of 2
strings in single file or list, so let's optimize that to a single iteration
through the file/list. This should reduce some redundant file I/O.

I do find this API a little confusing with the filename or list at the end
of the argument list, but kept it consistent with the existing single string
findstr functions (which are now just wrappers for the new 2-string flavors).

I noticed during this update that findstr() did not share the same behavior
as findstr_in_list() (feature added in commit f08f2137) whereby if all the
patterns were negative searches (beginning with '!'), then *all* the
negative matches would have to be successful (not just the first) for the
function to return true. So now findstr() behaves like findstr_in_list()
in this regard.

I also added some optimizations to findstr_in_string().

I just wanted to reuse findstr() in vdmodem.c and I fell down this hole :-)

findstr.* is new (findstr() related functions moved from str_util)
getctrl.* is now finally the real home of get_ctrl_dir(), moved from str_util
trashcan* functions moved from str_util to scfglib
other scfg_t dependent functions moved from str_util to scfglib

net_addr() appears to be a function that was never created/used (?)

This will definitely break the *nix build, for now.

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...

The goal of this commit is that: only modules that either are part-of sbbs.dll/libsbbs.so or need to link with/use that library, will #include "sbbs.h" and thus be dependent on its subsequent includes (e.g. cryptlib.h, jsapi.h). This should mean extdeps.mk can be trimmed way down.

I also removed CVS keyword/comments and trimmed up the boilerplate copyright notice in modified and added source/header files in this commit.

There is no functional change in behavior in this comment.

This means the JS global word_wrap() method has a new optional Boolean arg
as well.

Most of the copyright years in the source code were misleading (the date of
most recent publish was actually later) and all were unnecessary. I've been
removing copyright years piecemeal, for a long time, but I decided it was time
to just perform a bulk search and (mostly) replace. In some cases, I left
old copyright years on files that either are not used (and soon to be removed)
or obsolete and unlikely to ever be touched again (e.g. Win9x FOSSIL VXD). Some
of the runtime binaries still contain copyright years and those were updated to
2018.

"Change the last argument of wordwrap() to a flags argument and support
making a bare LF not be ignored."
If soft line breaks (bare LFs) are stored in the message base, they're
expected to wrapped for 80-column terminal only.

Hopefully I did this right (Deuce?).

Separated code from crc32.h into crc32.c (to allow combination of mailsrvr and sbbs into single module).